Deletion and addition of unique index

 

-- 表user_info
-- 索引名UNIQ_ID_LOG


-- 查询索引
SHOW INDEX FROM user_info;


-- 删除索引
ALTER TABLE user_info DROP INDEX UNIQ_ID_LOG
DROP INDEX UNIQ_ID_LOG ON user_info 


-- 添加索引
ALTER TABLE user_info  ADD UNIQUE UNIQ_ID_LOG(`id`,`name`,`age`)