MySql存储过程-错误1172(42000):结果由多行组成
我已经编写了一个存储过程,根据数据库中提供的一些折扣方案来计算净产品金额。。。。存储过程编译成功,但在运行时我得到了错误1172(42000):结果由多行组成 我的代码如下所示MySql存储过程-错误1172(42000):结果由多行组成,mysql,stored-procedures,database-cursor,Mysql,Stored Procedures,Database Cursor,我已经编写了一个存储过程,根据数据库中提供的一些折扣方案来计算净产品金额。。。。存储过程编译成功,但在运行时我得到了错误1172(42000):结果由多行组成 我的代码如下所示 delimiter // CREATE PROCEDURE calculateNetItemAmount(IN productId INT,IN quantity INT, OUT netItemAmount DOUBLE) BEGIN DECLARE discountPer DO
delimiter //
CREATE PROCEDURE calculateNetItemAmount(IN productId INT,IN quantity INT, OUT netItemAmount DOUBLE)
BEGIN
DECLARE discountPer DOUBLE DEFAULT 0;
SELECT `SellingUnitPrice` into netItemAmount
FROM `TBL_PRODUCT_MASTER` WHERE `Id` = productId;
SET netItemAmount = quantity * netItemAmount ;
SELECT discDetail.`DiscountPercentage` into discountPer
FROM `TBL_DISCOUNT_DETAIL` AS discDetail , `TBL_DISCOUNT` AS disc, TBL_PRODUCT_DISCOUNT AS prodDisc
WHERE disc.`DiscountStartDate` < NOW()
AND disc.`DiscountEndDate` > NOW() AND disc.`IsEnabled` = 1
AND disc.`SchemeType` = 'Quantity Discount'
AND discDetail.DiscountId = disc.Id AND prodDisc.productId = productId
AND prodDisc.`IsEnabled` = 1 ;
IF discountPer IS NOT NULL THEN
SET netItemAmount = netItemAmount * (1 - discountPer * 0.01)
END IF;
SELECT discDetail.`DiscountPercentage` into discountPer
FROM `TBL_DISCOUNT_DETAIL` AS discDetail , `TBL_DISCOUNT` AS disc, TBL_PRODUCT_DISCOUNT AS prodDisc
WHERE disc.`DiscountStartDate` < NOW() AND disc.`DiscountEndDate` > NOW()
AND disc.`IsEnabled` = 1 AND disc.`SchemeType` = 'Volume Discount'
AND discDetail.DiscountId = disc.Id AND prodDisc.productId = productId
AND prodDisc.`IsEnabled` = 1 ;
IF discountPer IS NOT NULL THEN
SET netItemAmount = netItemAmount * (1 - discountPer * 0.01)
END IF;
END//
delimiter ;
请帮助我…提前谢谢..您必须确保,只需要一行的查询,只需返回一行即可 例如,您的查询在语句中使用了
:
SELECT `SellingUnitPrice` into netItemAmount
FROM `TBL_PRODUCT_MASTER` WHERE `Id` = productId;
查询返回多行的原因很多(数据不一致、重复记录……任何原因)
一个建议(但不建议)解决方案是在句末添加限制1
SELECT `SellingUnitPrice` into netItemAmount
FROM `TBL_PRODUCT_MASTER` WHERE `Id` = productId
LIMIT 1;
当您使用时,请选择。。。对于变量
,查询只能匹配一行。您的一个查询返回了多行。What isSET-netItemAmount=netItemAmount(1-折扣每0.01)代码>应该是什么意思?里面有没有丢失的*
?实际上是。。。。设置netItemAmount=netItemAmount(1-折扣率*0.01);你的意思是设置netItemAmount=netItemAmount*(1-折扣率*0.01)
?在注释中添加代码时使用反勾号。编辑问题以显示正确的公式。
SELECT `SellingUnitPrice` into netItemAmount
FROM `TBL_PRODUCT_MASTER` WHERE `Id` = productId
LIMIT 1;