• Coordinated physical changes to computer data bases; and codes, tested and implemented SQL data base, applying knowledge of data base management system. • Established physical data base parameters. • Coded SQL data base descriptions and specified identifiers of SQL data base to data base management system or directs others in coding data base descriptions. • Calculated optimum values for SQL data base parameters, such as amount of computer memory to be used by data base, following manuals and using calculator. • Specified user access level for each segment of one or more data items, such as insert, replace, retrieve, or delete data. • Specified which users can access data bases and what data can be accessed by user. • Tested and corrected errors and refined changes to data base. • Entered codes to create production data base. • Selected and entered codes of utility program to monitor data base performance, such as distribution of records and amount of available memory. • Directed programmers and analysts to make changes to data base management system. • Reviewed and corrected programs. • Conferred with coworkers to determine impact of data base changes on other systems and staff cost for making changes to data base. • Modified data base programs to increase processing performance, referred to as performance tuning.