query processing
query processing
1. The retrieval of information from a database according to a set of retrieval criteria, the database itself remaining unchanged.
2. In the context of a specific query language, the technique of translating the retrieval criteria specified using the language (see def. 1) into more primitive database-access software, including a selection among different methods to choose the most efficient in the particular circumstances.
1. The retrieval of information from a database according to a set of retrieval criteria, the database itself remaining unchanged.
2. In the context of a specific query language, the technique of translating the retrieval criteria specified using the language (see def. 1) into more primitive database-access software, including a selection among different methods to choose the most efficient in the particular circumstances.
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query processing