Explain how each of the eight potential cost estimate methodologies may be combined with a variety of heuristic criteria when the DBMS is optimising the query, as well as how this influences the amount of work that the DBA has to complete.

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Database management

Database management allows people to store, retrieve, and organize data from a computer. Database management defines the data operations, storage, and security practices of the database administrators throughout the data life cycle. Database management involves supporting, designing, and implementing the stored data to maximize its value.