如何在MySQL中查找包含两个特定列的所有表？
要找到两个特定的列名称，请使用information_schema.columns。在这里，我使用Id代替columnA，使用Name代替columnB-
mysql> select table_name as TableNameFromWebDatabase
-> from information_schema.columns
-> where column_name IN ('Id', 'Name')
-> group by table_name
-> having count(*) = 3;这将产生以下输出。以下是具有ID和Name列的表-
+--------------------------+ | TableNameFromWebDatabase | +--------------------------+ | student | | distinctdemo | | secondtable | | groupconcatenatedemo | | indemo | | ifnulldemo | | demotable211 | | demotable212 | | demotable223 | | demotable233 | | demotable251 | | demotable255 | +--------------------------+ 12 rows in set (0.25 sec)
为了证明这一点，让我们检查其中一张表的描述。以下是查询-
mysql> desc demotable233;
这将产生以下输出。在这里，您可以看到我们有Int和Name列-
+-------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+----------------+ | Id | int(11) | NO | PRI | NULL | auto_increment | | Name | varchar(20) | YES | | NULL | | +-------+-------------+------+-----+---------+----------------+ 2 rows in set (0.00 sec)