クエリ最適化
1. Query optimizerThe query optimizer is the component of a database management system that attempts to determine the most efficient way to execute a query. The optimizer considers the possible query plans for a given input query, and attempts to determine which of those plans will be the most efficient. Cost-based query optimizers assign an estimated "cost" to each possible query plan, and choose the plan with the smallest cost.
Read “Query optimizer” on English Wikipedia
Read “クエリ最適化” on Japanese Wikipedia
Read “Query optimizer” on DBpedia
Read “Query optimizer” on English Wikipedia
Read “クエリ最適化” on Japanese Wikipedia
Read “Query optimizer” on DBpedia
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