如何使用like運算符編寫mysql存儲過程

Question

以下是我的代碼：

     DELIMITER $$

     CREATE DEFINER=`root`@`localhost` PROCEDURE `employee_with_asset`(IN name     VARCHAR(250))
     BEGIN
     SELECT a.Asset_code,a.name as name1,a.type,a.description,`purchase date`,
    `amc availability`,`amc renewal`,`employee Id`,b.Name FROM `asset_details` a,
     employee b WHERE  b.Name LIKE '%' + @name + '%' and a.`assigned to`=b.`employee Id`;
     END

它在LIKE附近顯示錯誤。 如何解決它。

Answer 1

mysql中的串聯是使用CONCAT()

LIKE CONCAT('%', @name , '%')

完整聲明

DELIMITER $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `employee_with_asset`
(
    IN _name     VARCHAR(250)
)
BEGIN
    SELECT  a.Asset_code,
            a.name as name1,
            a.type,
            a.description,
            `purchase date`,
            `amc availability`,
            `amc renewal`,
            `employee Id`,
            b.Name 
    FROM    `asset_details` a
            INNER JOIN employee b 
                ON a.`assigned to` = b.`employee Id`
    WHERE   b.Name LIKE CONCAT('%', _name , '%');
END $$
DELIMITER ;

Answer 2

John Woo的答案是正確的但是如果你不使用utf8_general_ci集合，你必須在WHERE子句之后（如果你有多個條件，在每個條件之后）轉換集合，就像你比較的列的集合一樣

... WHERE name LIKE CONCAT('%', @name , '%') COLLATE utf8_unicode_ci

或多個條件

... WHERE name LIKE CONCAT('%', @name , '%') COLLATE utf8_unicode_ci
OR job LIKE CONCAT('%', @name , '%') COLLATE utf8_unicode_ci ...