你能帮我解决这个问题吗？

Question

编写查询结构以创建或替换名为

UPDATELEADERSSCORE

的存储过程，该存储过程采用

inSchoolID

参数作为

integer

和

inLeaderScore

参数作为

integer

.

CREATE PROCEDURE UPDATE_LEADERS_SCORE( in_School_ID INTEGER, in_Leader_Score INTEGER)
BEGIN
    UPDATE SCHOOLS
    SET Leader_Score = in_Leader_Score
    WHERE School_ID = in_School_ID

我试过了，但一直出错

Answer 1

您的代码缺少 DELIMITER 语句和 UPDATE 语句后的分号。此外，在声明输入参数时，最好对 IN 关键字使用大写字母。

DELIMITER //

DROP PROCEDURE IF EXISTS UPDATE_LEADERS_SCORE //
CREATE PROCEDURE UPDATE_LEADERS_SCORE(IN in_School_ID INTEGER, IN in_Leader_Score INTEGER)
BEGIN
    UPDATE SCHOOLS
    SET Leader_Score = in_Leader_Score
    WHERE School_ID = in_School_ID;
END //
DELIMITER ;

您还应该考虑使用注释以及如何处理错误，例如：

DELIMITER //

DROP PROCEDURE IF EXISTS UPDATE_LEADERS_SCORE //
CREATE PROCEDURE UPDATE_LEADERS_SCORE(IN in_School_ID INTEGER, IN in_Leader_Score INTEGER)
BEGIN
    -- Declare a CONTINUE HANDLER for duplicate key error
    DECLARE CONTINUE HANDLER FOR 1062
    SELECT 'Error, duplicate key occurred';

    -- Update the SCHOOLS table with the new Leader_Score
    UPDATE SCHOOLS
    SET Leader_Score = in_Leader_Score
    WHERE School_ID = in_School_ID;
END //

DELIMITER ;