MySQL :: MySQL 5.5 Reference Manual :: 8.8 Understanding the Query Execution Plan

MySQL :: MySQL 5.5 Reference Manual :: 8.8 Understanding the Query Execution Plan

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日期:2025-06-23
Depending on the details of your tables, columns, indexes, and the conditions in your WHERE clause, the MySQL optimizer considers many techniques to efficiently perform the lookups involved in an SQL query. A query on a huge table can be ......看更多