查询某个字段在数据库的哪个表中

select * from information_schema.columns
where table_schema = "数据库名"
and column_name = "字段名"

查询某个值在数据库的哪个表中

DROP TABLE  if EXISTS temp;
CREATE TABLE temp(tablename VARCHAR(255),LieName VARCHAR(255));
 
delimiter $$
DROP procedure IF EXISTS getDataByDbName $$
CREATE procedure getDataByDbName(in dbName VARCHAR(255),IN ziduan VARCHAR(255))
BEGIN
DECLARE num INT;
SET @STMT =CONCAT("SELECT COUNT(*) FROM ",dbName," WHERE `",ziduan,"` LIKE BINARY '%值%' INTO @num;");
PREPARE STMT FROM @STMT;
EXECUTE STMT;
IF(@num>0) THEN
    INSERT INTO temp VALUES (dbName,ziduan);
END IF;
end$$
delimiter ;
 
delimiter $$
DROP PROCEDURE IF EXISTS processquanjusou$$
CREATE PROCEDURE processquanjusou()
BEGIN
DECLARE done BOOLEAN DEFAULT 0;
DECLARE biao VARCHAR (255);
DECLARE ziduan VARCHAR (255);
DECLARE indexss CURSOR
FOR
SELECT TABLE_NAME,COLUMN_NAME FROM information_schema.COLUMNS WHERE TABLE_SCHEMA='数据库名' ;
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done=1;
OPEN indexss;
repeat
FETCH indexss INTO biao,ziduan;
call  getDataByDbName(biao,ziduan);
UNTIL done END repeat;
CLOSE indexss;
end$$
delimiter ;
 
CALL processquanjusou();
 
SELECT * FROM temp;