Select query view database names oracle 10g työt

...containing the exam order details and the patient's name should be sent automatically via email and available to direct download. - The website need to be simple for the customer and easy to buy with a few steps. -The website need to have a page of "about us", "Medical information", "Exam page categories with a subcategories of exam, sorted by different spect of the customer, the customer can select wich exam they want to buy (to add to the cart) and need to have a bottom for contact us by form for special requeriments of exams. Also we need a bottom on the inicial page to get partnership with companies. We also want to have an information filling form like the one in this website: to help customers who didn't know what they need. -The website...

Build an ISO for a raspberry pi (with cellular notecard) to scan for unique cell phones in a specific range and log the unique phone ID and timestamps/ping (distance) from the raspberry pi and store in mysql database using cellular adapter.

I'm in need of a proficient expert who can assist me with running queries on DuckDB using data originating from Amazon S3. This task primarily involves: - Interacting with semi-structured data such as XML and JSON - Processing a substantial data volume ranging from 1GB to 1TB The ideal freelancer should have the following capabilities: - Deep understanding and experience with DuckDB and Amazon S3 - Strong skills in handling and querying semi-structured data - Experience in managing and processing large volumes of data Please note: it's critical that the freelancer have experience with managing these sorts of tasks previously and has a solid understanding of large volume data manipulation.

Rekisteröidy tai kirjaudu sisään nähdäksesi tiedot.

Before you bid, read carefully. Do not ask me about my budget during the chat because I have already indicated the budget if you can't help or if you think the budget is too little, save some time for both of us I want to have a website made by a freelancer. the website is intended to track and register passengers and drivers. the database must have the following users. -Administrator -Driver -Parents what should the driver be able to do? 1. register 2. Scan passenger in and out using a QR code 3. be able to record comments for each passenger per day if necessary 4. being able to see each passenger monthly report of where they got in/out and at what time. 5. Be able to create a QR code for every name. Drivers must be able to clock in and clock out while driving. what shou...

I am seeking a skilled data miner to initially extract at least 1,000 company names, telephone numbers, and emails of translation agencies in the United States. We will provide the names of the cities, and the data miner will be responsible for searching local translation agencies on Google that meet these requirements. The database is to be created on a Google Spreadsheet. Based on this information, please tell us how many entries you can complete per hour and your best rate per hour.

I'm in need of a skilled video editor to create a cinematic 1.30 minute video capturing "a day in my city". I have a collection of 150 video clips, ranging from 1 to 5 seconds each, and an addition...The primary emotion I want this video to convey is 'Inspiration'. Therefore, the editing should reflect this tone and help to deliver the message effectively. Ideal Skills and Experience: - Proficiency in video editing software (e.g., Adobe Premiere Pro, Final Cut Pro) - Experience in creating cinematic-style videos - An understanding of the power of music in video editing, and the ability to select and integrate music effectively - Strong portfolio of previous work, particularly in creating inspirational video content - Familiarity with creating dynamic transi...

...that reflects our company's activities in business establishment, commercial licensing, and business services. Logo Design Requirements: 1. Innovation: We want an innovative and unique logo that clearly represents our company's vision and services. 2. Icon Only: The logo should be an icon only, without any text or letters from the company name, as it will be used with both the English and Arabic names of the company. 3. Versatility: The logo should be versatile and suitable for use across various media and platforms. 4. Originality: The logo must be original and not copied or similar to logos of other companies in the same field. 5. Presentation: Designers must provide a mockup showing how the logo icon will appear next to the company name. Deliverables: • The fi...

...skilled professional who can assist me in setting up the Odoo Books system for my invoicing processes. Requirements: - Configure the system to enable the creation of goods and service invoices in USD. - Implement moderate customization to the invoice templates, focusing on layout changes and adding custom fields. - Import all of my product information from an Excel sheet. This includes product names and their respective cost prices (which are in INR). - Enable and Teach me to Use Odd's OCR feature to fetch pdf data from invoice to transfer it to software Ideal Candidate: - Proficient in working with Odoo Books and setting up invoicing processes. - Experience with customizing invoice templates within Odoo. - Skilled in data import from Excel sheets to Odoo. I look forw...

I need a WordPress portal that allows me to input text and images for specific user groups to access. Key Elements: - The admin should be able to input and update text or image content on the platform. - I want this content to be visible only to registered users and admin users. Guests should not have access to it. - Users will need to log in to view the content, so some form of user authentication is also necessary.

Im on a 64bit machine.. i want to bring back the resulks from HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionUninstall AND list the DISPLAYNAMES in a text file... BUT, this i can do, as it shows all results fine only in 64 part of the registry. I also need it to show results for 32 bit also. ive tried subsituing keys KEY_WOW64_32KEY to access the 32-bit view of the registr to access KEY_WOW64_64KEY but it doesnt show 32 results. So i need it to show both 32BIT AND 64BIT DISPLAYNAMES under HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionUninstall in a text file

I'm in need of a skilled Delphi developer who can quickly generate a program that can dive into the registry of a Windows machine and extract the names of all programs listed in the "Add/Remove Programs" section. Key Requirements: - The code should be written in Delphi. - It should effectively scan the registry. - Extracted program names should be displayed in a listbox. This is a simple task, but it's important that the code is efficient and free from bugs.

I am in need of a skilled web developer to create a web application to display my events and deadlines. I'm looking for a monthly view for a personal user experience. The project will require a developer who's experienced in creating user-friendly, visually appealing web applications. Key requirements: - A monthly calendar view, that is easily navigable and intuitive for personal use - Ability to clearly display a range of different events and deadlines - A clean and modern design that is mobile responsive, as most of my users will be accessing the app on their phones - Some experience with event scheduling software would be a plus I appreciate any insights or ideas that you can bring to the table. I'm looking forward to seeing your proposals.

For this task, I am searching for a freelancer skilled in audio editing to extract names from a 20-minute audio. The quality of the recording is good. What is needed: - Eliminate names using a beep sound. The outcome should not interrupt the flow of dialogue, maintaining as natural a progression as possible. - Post redaction, convert the audio file to MP3 format. Ideal Skills and Qualifications: - Experience with audio editing, specifically redaction. - Expertise in manipulating sound while minimising disruption to surrounding audio. - Proficient in converting audio files to different formats. Please ensure you have the correct software and expertise before bidding. This project requires precision and attention to detail for effective completion.

I ...appliances, weapons, clothing, jewelry) Each texture and model thumbnail should display a preview image and name Texture and Model Functionality Textures should be draggable and droppable onto objects in the 3D viewport to apply the texture Models should be draggable and droppable into the 3D viewport to import the model directly into the scene For each texture and model, there should be an option to select the resolution (8K, 4K, 2K, 1K) Other Requirements The addon should be well-organized, easy to navigate, and load quickly without slowing down Blender The textures and models should be high-quality and professionally created The addon should be regularly updated with new content It should be compatible with the latest version of Blender The author name should be "Cube C...

...donations to help me from losing my home & business: 5/18/2024 Once again, thank you to the people that have donated so far. However, it’s been too long since anyone made a donation. I realize it must be difficult to give money to a person you haven’t seen for years or never met. I wanted to run a “Rewards Based Campaign” where contributors could select either Prints of my Artwork or select from my list of 200 different titles of Vintage Children’s books or both but GoFundMe prohibits offering rewards. I’ve been a successful award winning world-class professional painter & printmaker for decades. However (as mentioned in my campaign) Redundancy in my “Visual Arts” profession (due to circumstances unrelated to job ...

...complete but due to some error while connecting to the database some code is missing and the connection is not completed. You have to find out where the problem is and fix it properly. I will help you in everything ******* I'm seeking a skilled PHP developer to assist with a project that involves fixing a PHP file and combining a Php ,MySQL database. The main tasks for this project include: - Resolving a database connection issue in the PHP file. - Combining the MySQL database in the backend of the PHP file. Your role will be crucial in ensuring that the database is correctly integrated into the PHP file and that the database connection is stable and error-free. The PHP file should be able to successfully communicate with the MySQL ...

I'm looking for a...promotional video for the launch of a new service. Providing a creative flair with attention to detail, the ideal candidate will capture the essence of our new service through compelling visuals and engaging storytelling. Key Responsibilities: - Conceptualize, produce and edit a promotional video for our new service Required Skills and Experience: - Proven experience in video production - Good view on story telling - Excellent attention to detail - A strong portfolio demonstrating creativity and proficiency in promotional video production - Proven ability to tell a story through video content. The primary objective of the video is to generate excitement and anticipation for the launch while effectively conveying the innovative nature and benefits of o...

I'm in need of a web developer with experience in ASP.NET MVC (Model-View-Controller) web framework to create a news-focused informational website about video games. Specifically, the site will concentrate on video games news. The successful candidate should possess the following skills: - Strong proficiency in the ASP.NET MVC framework - Understanding of news website structure and functionality - Knowledge or interest in video games would be beneficial - Previous experience in designing and building news-websites would be a significant advantage The website should have an engaging, easy-to-navigate user interface that offers a seamless user experience. A keen eye for attention to details would be appreciated. The point is to make the latest gaming news easily accessible and...

...icon for my mobile app called Zemcos. Focus on icon for zemcos. It's not like a logo. It's a icon you can make as logo. Crypto related!!!!!!! Key Requirements: - Design: The logo should be clean, modern and professional. It will be the face of the app, so it should represent both the tech nature of the app as well as a sense of reliability and innovation. - Color Scheme: You have the freedom to select the color scheme, but it should be visually appealing and align with the modern and tech-forward theme of the app. Ideal Skills and Experience: - Proven experience in creating modern and professional logos. - Strong understanding of color theory and design principles. - Ability to deliver high-quality work within a reasonable time frame. Please provide a portfolio of s...

As a business professional and event planner, I'm seeking an experienced Project Manager to oversee a PropTech event in Toronto, Canada focusing on education and networking. Key Responsibilities: - Manage all aspects of this half-day event, ensuring seamless execution from start to finish. - Work closely with our team to develop a clear agenda and select top-quality speakers. - Take charge of marketing, ticket sales, and audience engagement. - Ensure all technical and logistical aspects of the event are meticulously planned and implemented. Skills and Experience: - Proven track record in event management, ideally with a focus on educational events. - Strong organizational and time-management skills. - Excellent communication and negotiation abilities. - Familiarity with PropT...

I need a website that will allow users to book gaming rooms and interact with us through a contact form. Key Features: - **Booking System**: The main functionality of the website will be to allow users to book gaming rooms. The system should support a calendar view that displays the availability of the rooms. This view should be user-friendly and easy to navigate. - **Contact form**: Users must be able to contact us easily. This can be achieved through a contact form. The form should be simple and should have fields for name, email, subject and message. The website should be SEO-friendly and content should be newly created. Along with Booking it will have 1 dynamic home page and 3 other information static pages. E.g. of website needed is Ideal Candidate: - Experie...

I'm looking for a skilled and experienced WordPress professional to redesign my current website. The primary reasons for this project are to address its outdated design and poor user experience. Key Points: - Outdated Design: The color scheme and layout are the main elements that need updating. The current design is not engaging or aesthetically...that showcases your website redesign projects, please include it in your bid. Your creativity, expertise, and ability to deliver a user-friendly website will be key in the successful execution of this project. We want a New Design Close to the setup of this website Looks appealing style is great nice bootstrap Latest HTML5 CSS3 We will show our website once we select someone All we need is homepage PSD Design

For this project, I'm seeking a proficient iOS Developer to build a simple directory app. This app should contain the basic functionalities such as user search, view, and more. It should be developed with a left drawer navigation system. The main skills and experiences preferred for this task include: - Proficiency in iOS Development - Experience in designing and implementing search and navigation functions - Knowledge of directory structure and data management The completion of the project is expected within a month, therefore a commitment to meeting this deadline is necessary.

...lottery system for me. The system should be designed to allow anonymous participation, with the winners being selected automatically by the system. Key Features: - Web-based: The lottery system should be accessible through web browsers. - Anonymous participation: Users should be able to participate without the need for user registration. - Automated winner selection: The system needs to be able to select winners automatically without manual intervention. Ideal Skills and Experience: - Proficiency in web development - Experience in creating lottery systems or similar - Knowledge of automated selection processes This project involves a good amount of logic and system design, so experience in similar projects is highly valued. Your bid should include a reference to your previou...

...managing workplace shift schedules. It is enough that this project has the qualifications to do the job. I am leaving a few photos so that you can have general information about the project design. It is sufficient that at least the texts that will be seen in the UI be in Turkish. Key Features: - Employee login and registration - Comprehensive shift scheduling and management tools - Facility to view and edit shift details - User access restrictors based on roles The web platform should be designed with a professional and corporate aesthetic, ensuring it's not only functional but visually appealing to users. Ideal Skills and Qualifications: - Proficiency in web development, particularly with SpringBoot : Java and Angular: TypeScript or JavaScript - Experience in creating ...

I am in need of unique words for high-end, exquisite diamond jewellery creations - specifically rings, earrings, pendants,...elegant. I will be providing you with the links to products from which you need to create a unique word also i will provide you with some examples. The crafted titles will be aimed at luxury consumers. Therefore, the freelancer should ideally have: - Experience or background in jewellery, fashion or luxury market industries. - A strong creative, imaginative mindset to generate unique, captivating names. - An understanding of appeal to luxury consumers. The task will involve working prominently with diamonds, so knowledge about this precious gemstone would be beneficial. Your mission is to evoke the opulence, elegance, and timeless allure associated with my ...

As the project owner, I'm seeking a professional skilled in Pine Script with experience in retrieving code from private scripts on Trading view. The key objectives of this project include: - Extracting the Pine Script code from a specific invite-only script (the script name will be shared privately upon project commencement). Unfortunately, it's currently unknown which specific script to be used, but clarity will be provided as the project progresses. - Discern the implemented functions within the script. The functionalities mainly centered around recognizable trading indicators like Moving averages, Pivots, Fibonacci and MACD. - The code extraction should consider compatibility with variable timeframes. Whilst exact timeframes aren't specified yet, flexibility sho...

...creating an ER diagram, relational schema, database dump, SQL files, and queries for a library database system. Requirements: - ER Diagram: An ER diagram is required with rationalities similar to the example provided in this link: - Relational Schema: Develop a relational schema that effectively models the database. - Database Dump: Provide a database dump for the system. - SQL Files and Queries: The project should include a set of SQL files and queries that effectively interact with the database. - Managerial Queries: Develop a minimum of 20 managerial queries that will be used to analyze and manage the library database. Deadline: This project must be completed by Monday. Ideal Skills: - Proficiency in database design and SQ...

I'm looking for a Python developer to create a simple Dash app that includes a PDF viewer. Key Requirements: - User can upload multiple pdf files in the app. - The user can select which pdf should be displayed in the viewer - the user can enter a text in a text box and when hit submit the app should be able to highlight those texts in the PDF.

...of at least 100 sample products for demonstration. recommendation system: Generate recommendations based on simple rules and user behavior. For example, you can recommend products that are popular among other users, products in the same category as the ones the user has viewed, or products with similar price ranges. Store and update user view history in the database. Display recommended products on the user dashboard based on the user's preferences and view history. Search with Basic Recommendations: Enhance the search functionality to provide basic recommendations. Modify the search algorithm to consider user preferences and recommended products while retrieving search results. Implement autocomplete or search suggestions based on user behavior and popular sea...

I'm looking for a video editor to help with basic editing tasks such as trimming and merging footage. The final video is expecte...to enhance the overall viewing experience. Key Responsibilities: - Trimming and merging of video footage - Adding suitable background music to the video - Ensuring the final video is between 5 to 10 minutes in length Ideal Skills and Experience: - Proficient in video editing software such as Adobe Premiere Pro, Final Cut Pro, or similar - Experience with basic video editing tasks - Ability to select and integrate appropriate background music - A good eye for detail and timing to ensure a cohesive edit - Previous experience with similar video editing projects will be a plus. If you can deliver professional results in a timely manner, I'd lo...

...complex backend development and database integration tasks and run code as offline. Key Responsibilities: Develop, test, and maintain robust, scalable, high-quality software solutions. Design and implement new features and functionality. Write clean, maintainable, and efficient code. Develop RESTful APIs to support front-end functionality. Integrate user-facing elements developed by front-end developers with server-side logic. - In-depth understanding and experience of backend operations using Python Django. - Managing and integration of the database with the application. - Maintenance and improvement of existing codebase for optimal functionality. Desirable Skills: - Proven experience in Python Django for backend development. - Hands-on experience in database ...

Visit place and take pictures Company: Fairmead Providers Inc. Company: Venao Vista Address: Calle Principal, Edificio Le Teja Roca, Pedasi, Los Santos, Panama ...................................... Company: HB Venado, S.A Address: Venao beach, Pedasi, Pedasi District, Los Stantos Province, Panama Here is both addrss info Visit and check with company name board pic if present outside oth...Address: Calle Principal, Edificio Le Teja Roca, Pedasi, Los Santos, Panama ...................................... Company: HB Venado, S.A Address: Venao beach, Pedasi, Pedasi District, Los Stantos Province, Panama Here is both addrss info Visit and check with company name board pic if present outside otherwise take Building name and Number board pic building pic street sign name board pic street vi...

I am seeking to create an scalable app compatible with both iOS and Android for managing appointments at my client's beauty salon. This will help my customers book various services like hair and nail treatments more efficiently. Key Requirements: 1. Appointment Booking: The app should have a calendar view showcasing availability, a selection for time slots, and service selection. It should be easy to navigate and provide real-time accuracy for available slots. 2. User Authentication: To ensure secure bookings, I would like the users to either authenticate via their email and password, or through phone number verification. Ideal Skills and Experience: - Proficient in iOS and Android app development - Understanding of secure user authentication methods - Prior experience dev...

...of at least 100 sample products for demonstration. recommendation system: Generate recommendations based on simple rules and user behavior. For example, you can recommend products that are popular among other users, products in the same category as the ones the user has viewed, or products with similar price ranges. Store and update user view history in the database. Display recommended products on the user dashboard based on the user's preferences and view history. Search with Basic Recommendations: Enhance the search functionality to provide basic recommendations. Modify the search algorithm to consider user preferences and recommended products while retrieving search results. Implement autocomplete or search suggestions based on user behavior and popular s...

I'm seeking a creative 3D design artist to produce a unique product design for a sketchbook. - The output should be a 3D model of the concept, compatible with Blender software. - No specific textures or materials are compulsory to use. Your creative liberty is welcomed in deciding what best fit...to use. Your creative liberty is welcomed in deciding what best fits the model design. - The final output should be detailed, realistic, and visually compelling. It should portray the sketchbook as a premium product. Ideal freelancers for this project should have: - Expertise in 3D modeling, specifically product designs - Proficiency in using Blender software - A creative mindset to ideate and select textures/materials that enhance the design - High regards for project deadlines and...

...is when the young explorers gather around to study a secret map. They each have small backpacks and would be standing on a small path in front of a rock face. There is no specific requirement regarding the interaction between the characters. Other scenes depict their young mothers being handed an old ribbon bound file. The four children setting up tents with the rundown Manor House partially in view behind dense bushes. The four children struggling to push open the huge church style oak doors to the rundown manor, a small pirate style chest hidden in a basement recess. Because the illustrations are to be small, partial background to set the scene and add flavour will be acceptable. First draft Manuscript is 25% written and will be available to act as a brief. full pre edit manus...

We are seeking an experienced PHP developer to assist in fixing existing and add new back-end functionality. Our platform allows parents to book their children's lunch boxes for selected schools, offering multiple choices for the boxes. Parents can select the school and timings through dropdown menus. We receive the details on our dashboard and print stickers to be pasted on the boxes. Currently, we are facing issues with obtaining accurate order details, leading to mismanagement and manual intervention. We also want to integrate a monthly subscription feature for parents. The ideal candidate should have a strong understanding of PHP and be able to create clean, efficient, and scalable code. As a PHP Developer, you will be responsible for implementing new features, improving ...

Our project aims to enhance the Django website running on Ubuntu by addressing several key issues. We will streamline Google registration, fix email registration to avoid redundant data requests, and update the logo. We'll verify email confirmation, resolve logout errors, and ensure the machine names display fully. We'll adjust font sizes, reorganize dashboard boxes, correct console errors, and fix icon colors. Additionally, we'll refine machine information display, adjust button states, and update dropdown menu functionality. Finally, we'll correct API settings visibility and fix data display issues on the profile page and other sections.

I've compiled a comprehensive global leads database with 8 million entries. The database includes a variety of details such as name, email, contact number, website, profession, and even Instagram username. - **Purpose**: This database is specifically designed for sales leads generation. It's meant to help businesses and organizations reach out to potential customers and grow their sales. - **Categorization**: The leads are not just categorized by one specific filter. Instead, they're a mix of different categories from various industries, countries, and professions. This eclectic mix provides a wide range of opportunities for potential buyers. - **Delivery Method**: I'm looking to sell this database through a CSV file, online access to the...

...well-structured and engaging presentation based on user input Bot Development: Design and implement a Telegram bot that interacts with users to gather presentation requirements. Ensure the bot can handle multiple languages: Uzbek (uzb), Russian (rus), and English (eng). User Interaction Workflow: - Implement a step-by-step process where users provide the presentation theme. - Allow users to select the presentation language. - Enable users to choose the presentation owner, number of slides, and presentation style or pattern. Presentation Plan Generation: - Develop functionality for the bot to generate an editable presentation plan based on user input. - Provide options for users to review and edit the generated plan before proceeding. Slide Description Gen...

...the icons. Cross-Browser Compatibility: Ensure the carousel works seamlessly across all major browsers on mobile devices. Clean Code: Write clean, well-documented code that does not interfere with other parts of the website. Testing: Thoroughly test the functionality on various mobile devices to ensure a smooth user experience. Attachments: Current Mobile View: (Attach the image showing how the trustbar looks on mobile currently) Desktop View: (Attach the image showing how the trustbar looks on desktop) Skills Required: Shopify Theme Customization HTML/CSS/JavaScript Responsive Web Design Carousel Implementation (e.g., using Slick, Owl Carousel, etc.) Please provide examples of similar work you have done in the past and a brief explanation of how you plan to implement th...

I'm in need of a creative professional who can revitalize the aesthetics of my dropshipping website. I'm specifically looking for someone to work on my landing page and make it have the visual appeal of a specified website. Here are the primary areas of intervention you'll be focusing on: • Incorporating more appealing imagery. I want someone with a keen eye for visuals to select and incorporate more captivating images to the landing page. • Color Scheme Revamp. Currently, my website operates on a black and white color scheme. I'd like to elevate this to a more dynamic and visually appealing palette. • Navigation Enhancement. I'm looking for an expert who can bolster the overall look and feel of my landing page’s navigation. The i...

MAX $60 As a business owner, I'm looking for a skilled freelancer to help me transfer an application from my old Windows server to a new one. The server is currently running on Windows OS and the application is built with Visual Fo...uploaded when you accept the job) 2) Download Windows Server 2016 II, Office 2019, , .NET Framework 4.7 or 4.8, Visual FoxPro 9 Executable. And it should be Configured to the present environment. 3) The on-line application should be connected to the desktop version and tested. 4) Chemplan and all its functionality should be tested and should be working. The output function of chemplan including view, to PDF and printer should all be working. 5) 40% of the payment will be kept for two weeks after project delivery to be sure the system is working p...

Commercial real estate agency database of GCC

About Plesk hosting upgrading the database from MariaDB 10.1 to 10.3 i would like to upgrade the database from MariaDB 10.1 to 10.3 for my hosting however, my hosting have a lot of client website in it, just would like to know if this upgrade will not affect the existing database thanks

I'm looking for a skilled 3D artist with a strong background in architectural design and visualization. The project focuses on renovating the exterior of a double story residential house on a steep angle. The house has ocean views from the North and West sides and hinterland views from West and South sides. Outputs required: - Exterior design and visual (in color) of (1) Western (street view), (2) Northern (ocean facing) and (3) Eastern (front door) elevations. No interior design required. - A visual (in color) of the Western side from street level is also required. The middle of the street is 18 meters from the current house, with the proposed addition of the pool and deck, this will reduce the distance to 14m. The street is 45m above sea level and the ground floor (floor / d...

I require an efficient programmer equipped with the crucial skills in Pine Editor coding. The project involves designing a script based on the 'Trading View' platform to automate my stock market trading strategy. The strategy revolves around Multiple EMA (Exponential Moving Average) crossing. For this specific task, a system with three different EMA lines is preferred. Ideal Skills & Experience: - In-depth knowledge of Pine Editor; - Familiarity with Trading View platform; - A fine understanding of EMA and its implementation in trading strategies; - Previous track record demonstrating similar tasks completed. I emphasize clarity and efficiency in the script to enhance my trading decisions. Please, get in touch if you can confidently handle these specificat...

Self Managed Home Care Providers Database