analyze table 一般可以指定分析: 表,所有字段,所有索引字段,所有索引。 若不指定则全部都分析。
sql> analyze table my_table compute statistics;
SQL> analyze table my_table compute statistics for table for all indexes for all columns;
SQL> analyze table my_table compute statistics for table for all indexes for all indexed columns;
sql> analyze table my_table compute statistics;
等价于:
SQL> analyze table my_table compute statistics for table for all indexes for all columns;
sample:
analyze table t1 compute statistics for table;
analyze table t2 compute statistics for all columns;
analyze table t3 compute statistics for all indexed columns;
analyze table t5 compute statistics for all indexes;
analyze table t4 compute statistics; (不指定)
另外,可以删除分析数据:
SQL> analyze table my_table delete statistics;
SQL> analyze table my_table delete statistics for table for all indexes for all indexed columns;
更多相关教程请访问 MySQL视频教程
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