1. 查看所有的数据表

-- 查看所有数据表;  SHOW TABLES;

2. 查看某个数据表的所有的字段

-- 查看表tb_watch_back的所有字段DESCRIBE tb_watch_back;SHOW COLUMNS FROM tb_watch_back;

3. 查询数据库中某个字段以及所在的表

-- 使用 INFORMATION_SCHEMA.Columns查询所有的表以及字段SELECT TABLE_NAME,COLUMN_NAME FROM  INFORMATION_SCHEMA.Columns WHERE TABLE_SCHEMA = 'super_star' AND  COLUMN_NAME = 'imei';

4. 使用存储过程更新数据库中某个字段的值

-- 如果存储过程存在就删除DROP PROCEDURE IF EXISTS update_imei;CREATE PROCEDURE update_imei(IN oldImei CHAR(15),IN newImei CHAR(15))BEGIN-- 定义循环条件DECLARE flag INT DEFAULT 0; -- 保存表名DECLARE tname VARCHAR(50);-- 查询数据库super_star中含有imei列的表,如果区分大小写使用binary COLUMN_NAME = 'imei'DECLARE result CURSOR FOR SELECT TABLE_NAME FROM  INFORMATION_SCHEMA.Columns WHERE TABLE_SCHEMA = 'super_star' AND  COLUMN_NAME = 'imei';-- 退出循环DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET flag = 1; -- 打开游标OPEN result;	WHILE flag <> 1 DO	-- 游标指向下一个位置,可以有多个数据,比如FETCH result INTO tname,ttype,...;	FETCH result INTO tname;		-- 拼接字符串表名sql,根据需要使用CONCAT函数连接		-- SET @execSql = CONCAT('SELECT * FROM  ',tname,' WHERE imei = ',oldImei,' ;'); 		SET @execSql = CONCAT('UPDATE ',tname,' SET imei =  ',newImei,' WHERE imei = ',oldImei,' ;'); 		PREPARE stmt FROM @execSql;		EXECUTE stmt;	END WHILE;END;-- 调用存储过程更新数据CALL update_imei('888888888888888','864773030025354');

5. 参考文章连接

select结果赋值: http://blog.csdn.net/su12345su/article/details/52997699字符串表名转换: http://blog.csdn.net/su12345su/article/details/52997699