MySql存儲過程中如何一起使用計數和喜歡子句？

Question

我使用了以下存儲過程，該過程動態獲取表名並獲取搜索關鍵字。

 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

當我像下面這樣調用上面的過程時。

   CALL GetTableLength('usertbl', 'kisan')

在這里，kisan是搜索關鍵字。

然后發生以下錯誤。 怎么了？

錯誤代碼：1054。“ where子句”中的未知列“ kisan”

Answer 1

嘗試如下使用：

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

即使您可以嘗試：

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

Answer 2

您需要在帶有引號''類似語句中傳遞搜索參數