Statistics on Query Expressions in Relational Database Management Systems
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Statistics on Query Expressions in Relational Database Management Systems
منابع مشابه
Automatic Management of Statistics on Query Expressions in Relational Databases
Statistics play an important role in influencing the plans produced by a query optimizer in a relational database management system. Traditionally, query optimizers use statistics built over base tables and assume independence between attributes while propagating statistical information through the query plan. This approach can introduce large estimation errors, which may result in the optimize...
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