Question

我使用了下面的存储过程来动态获取表名，并获得搜索关键字。

 DELIMITER $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `GetTableLength`(IN TABLE_NAME VARCHAR(100),
                                                                           IN SEARCH VARCHAR(150)) BEGIN IF (SEARCH = '') THEN
SET @query = CONCAT('select count(*) as total from ',TABLE_NAME); ELSE
SET @query = CONCAT('select count(userId) as total from ',TABLE_NAME, ' WHERE userName like ', SEARCH); END IF; PREPARE stmt3
FROM @query; EXECUTE stm3; END

当我打电话给上面的程序时如下。

   CALL GetTableLength('usertbl', 'kisan')

此处，kisan是搜索关键字。

然后发生以下错误。怎么了？

错误代码：1054。'where子句'中的未知列'kisan'

Answer 1

尝试使用如下：

set @query = CONCAT("select count(userId) as total from ",table_name, " WHERE userName like '", search,"'");

即使您可以尝试：

set @query = CONCAT("select count(userId) as total from ",table_name, " WHERE userName like '%", search,"%'");

Answer 2

您需要使用引用''

在like语句中传递搜索参数

如何在MySql存储过程中一起使用Count和Like子句？

2 个答案: