RENAME INDEX Synopsis Examples MySQL compatibility See also RENAME INDEX The statement ALTER TABLE .. RENAME INDEX renames an existing index to a new name. This operation i...
DROP INDEX 语法图 示例 MySQL 兼容性 另请参阅 title: DROP INDEX summary: TiDB 数据库中 DROP INDEX 的使用概况。 DROP INDEX DROP INDEX 语句用于从指定的表中删除索引,并在 TiKV 中将空间标记为释放。 语法图 AlterTableDropIndexSt...
MINUS Description Syntax Examples MINUS Description MINUS compares the result of two queries and returns the different rows in the first query that are not output by ...
EXPLAIN Statements Using Views Example EXPLAIN Statements Using Views EXPLAIN displays the tables that a view references, not the name of the view itself. This is because view...
问题描述 问题分析: 问题解决 问题描述 create table t1 ( id int auto_increment primary key , a int , b int , c int , v varchar ( 1000 ), key iabc ( a , b , c ), key ic ( c )) engin...