Data Base Administrator: Coordinates physical changes to computer databases, and codes, tests, and implements physical database, applying knowledge of database management system: Designs logical and physical databases [DATA BASE DESIGN ANALYST 039.162-014] or reviews description of changes to database design to understand how changes to be made affect physical database (how data is stored in terms of physical characteristics, for example, location, amount of space, and access method). Establishes physical data base parameters. Codes database descriptions and specifies identifiers of database to the database management system or directs others in coding database descriptions. Calculates optimum values for database parameters, for example, the amount of computer memory to be used by database, following manuals and using a calculator. Specifies user access level for each segment of one or more data items, for example, insert, replace, retrieve, or delete data. Specifies which users can access databases and what data can be accessed by the user. Tests and corrects errors, and refines changes to the database. Enters codes to create a production database. Selects and enters codes of utility program to monitor database performance, for example, distribution of records and amount of available memory. Directs programmers and analysts to make changes to the data base management system. Reviews and corrects programs. Answers user questions. Confers with coworkers to determine the impact of database changes on other systems and staff cost for making changes to the data base. Modifies database programs to increase processing performance referred to as performance tuning. Workers typically specialize in one or more types of database management systems. May also train us