生成查询或修改某个库中包含某个字段的所有表的语句

SELECT
 TABLE_NAME '表名',
 COLUMN_NAME '字段名',
   CONCAT( 'SELECT * from ',  table_name, ' WHERE  填入要查询的字段名 = "3" ;'  )  AS  `sql语句`
-- CONCAT拼接sql语句,按需要修改
 
FROM
 information_schema. COLUMNS
WHERE
 TABLE_SCHEMA = '填入要查询的库名'
AND COLUMN_NAME = '填入要查询的字段名';