获取缺失主键表信息的MYSQL语句

代码如下: SELECT a.`TABLE_SCHEMA` AS DB_NAME , a.`TABLE_NAME` , a.`TABLE_ROWS` ,a.`ENGINE` — , a.* FROM information_schema.`TABLES` a LEFT JOIN information_schema.`TABLE_CONSTRAINTS` b ON a.`TABLE_NAME` = b.`TABLE_NAME` AND a.`TABLE_SCHEMA` = b.`TABLE_SCHEMA` WHERE b.`TABLE_SCHEMA` IS NULL AND a.`TABLE_