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hx0011yy 发表于 2018-10-23 06:53:58

mysql--SQL语句

　　1.查找数据库的外键约束名
SELECT a.CONSTRAINT_NAME,b.TABLE_NAME from information_schema.REFERENTIAL_CONSTRAINTS a,information_schema.TABLES b WHERE a.TABLE_NAME=b.TABLE_NAME AND b.TABLE_SCHEMA = 'test';　　2.删除外键约束
select CONCAT('alter table ', b.TABLE_NAME, ' drop foreign key ', a.CONSTRAINT_NAME,';') frominformation_schema.REFERENTIAL_CONSTRAINTS a,information_schema.TABLES b WHERE a.TABLE_NAME=b.TABLE_NAME AND b.TABLE_SCHEMA = 'test';

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