概述 总结一下MySQL数据库查看无主键表的一些sql,一起来看看吧~ 1、查看表主键信息 --查看表主键信息 SELECT t.TABLE_NAME, t.CONSTRAINT_TYPE, c.COLUMN_NAME, c.ORDINAL_POSITION FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS t, INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS c WHERE t.TABLE_NAME = c.TABLE_NAME AND t.CONSTRAINT_TYPE = 'PRIMARY KEY