Question

下面的代码在没有create table语句的情况下完美运行。我花了一个小时看着这段简单的代码来找出错误。

DELIMITER $$

    USE `operations`$$

    DROP PROCEDURE IF EXISTS `rc_pending_data_tat_proc`$$

    CREATE PROCEDURE `rc_pending_data_tat_proc`()
    BEGIN
    (
    CREATE TABLE rc_pending_tat_temp /*works fine when I remove this*/

    SELECT IF(b.retailer IS NULL,a.retailer, b.retailer) AS Retailer,
     (CASE
     WHEN DATEDIFF(criteria_date,transaction_date)<=50
     THEN '<=50'
     WHEN DATEDIFF(criteria_date,transaction_date) <=70
     THEN '<=70'
     WHEN DATEDIFF(criteria_date,transaction_date) <=80
     THEN '<=80'
     WHEN DATEDIFF(criteria_date,transaction_date) <=90
     THEN '<=90'
     ELSE 
     '>90'
     END) AS Pending_since
     , COUNT(*) AS `count`, CURRENT_TIMESTAMP AS `date`
      FROM `rc_pending_data` a
      LEFT JOIN `rc_store_retailer_mapping` b
      ON a.retailer=b.store_name
    GROUP BY 1,2
    );
        END$$

    DELIMITER ;

它给出的错误非常标准，即

错误代码：1064 您的SQL语法有错误;检查与您的MySQL服务器版本对应的手册，以便在'create table rc_pending_tat_temp附近使用正确的语法 SELECT IF（b.retailer IS NULL，a.retailer，b.ret'在第4行

Answer 1

请在存储过程的 GROUP BY 1,2 部分之后删除“（ BEGIN 和”之后的“）”。我尝试了这个没有开始和结束括号，它对我有用。

Answer 2

在我看来，SQL并不喜欢你的查询试图创建一个空表的事实。

我只是用Google搜索，看看你是否可以创建一个没有任何列的表格，看起来它通常不是一件容易的事情。如果您想出于某些特定原因创建一个空表，那似乎是另一回事。但是，如果要解决此问题，请在表中添加至少一列。像这样：

CREATE TABLE rc_pending_tat_temp(Id INT);

这应该让你的查询运行。

修改

听起来您想要创建一个新表来存储SELECT语句的结果。为此，请查看SELECT INTO语句here的语法。这样您就可以根据SELECT语句的结果创建一个表格。

在这种情况下，您应该删除此行：

CREATE TABLE rc_pending_tat_temp

然后添加：

INTO rc_pending_tat_temp

所以你的查询应该看起来像这样：

DELIMITER $$ USE `operations`$$ DROP PROCEDURE IF EXISTS `rc_pending_data_tat_proc`$$ CREATE PROCEDURE `rc_pending_data_tat_proc`() BEGIN ( SELECT IF(b.retailer IS NULL,a.retailer, b.retailer) AS Retailer, (CASE WHEN DATEDIFF(criteria_date,transaction_date)<=50 THEN '<=50' WHEN DATEDIFF(criteria_date,transaction_date) <=70 THEN '<=70' WHEN DATEDIFF(criteria_date,transaction_date) <=80 THEN '<=80' WHEN DATEDIFF(criteria_date,transaction_date) <=90 THEN '<=90' ELSE '>90' END) AS Pending_since , COUNT(*) AS `count`, CURRENT_TIMESTAMP AS `date` INTO rc_pending_tat_temp FROM `rc_pending_data` a LEFT JOIN `rc_store_retailer_mapping` b ON a.retailer=b.store_name GROUP BY 1,2 ); END$$ DELIMITER ;

Answer 3

您好我通过良好的旧命中和尝试方法找到了问题，结果发现那些额外的括号（）导致了语法错误。删除它们，代码就像魅力一样！

DELIMITER $$

    USE `operations`$$

    DROP PROCEDURE IF EXISTS `rc_pending_data_tat_proc`$$

    CREATE PROCEDURE `rc_pending_data_tat_proc`()
    BEGIN
    (
    CREATE TABLE rc_pending_tat_temp /*works fine when I remove this*/

    SELECT IF(b.retailer IS NULL,a.retailer, b.retailer) AS Retailer,
     (CASE
     WHEN DATEDIFF(criteria_date,transaction_date)<=50
     THEN '<=50'
     WHEN DATEDIFF(criteria_date,transaction_date) <=70
     THEN '<=70'
     WHEN DATEDIFF(criteria_date,transaction_date) <=80
     THEN '<=80'
     WHEN DATEDIFF(criteria_date,transaction_date) <=90
     THEN '<=90'
     ELSE 
     '>90'
     END) AS Pending_since
     , COUNT(*) AS `count`, CURRENT_TIMESTAMP AS `date`
      FROM `rc_pending_data` a
      LEFT JOIN `rc_store_retailer_mapping` b
      ON a.retailer=b.store_name
    GROUP BY 1,2
    );
        END$$

    DELIMITER ;

使用create table语句创建MySQL过程语法错误

3 个答案: