本文介绍了Sql查询减法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我在一个表TRANS中有两列source_id和Qty 。 Source_id数量 2002 100 2002 200 2002 500 2002 -500 i想要获取 此 source_id的余额 100 + 200 = 300 因为(-500 + 500 = 0 )如何编写查询 for this 我可以显示 100 和 200 saparate 两行 as balance 我的尝试: i有两个列苏rce_id和Qty在一个表TRANS中。 来源_数量 2002 100 2002 200 2002 500 2002 -500 i想要获得此source_id的余额,即100 + 200 = 300,因为(-500 + 500 = 0) 如何为此 写一个查询,我可以在两行中显示100和200 saparate作为余额解决方案 你应该使用 SQL GROUP BY语句。 SELECT [Source_id],SUM([Qty]) FROM [YourTableName] GROUP BY ([Source_id]) 我可以在两行中显示100和200 saparate作为余额 我无法明白这一点。 i have two columns source_id and Qty in one table TRANS. Source_id Qty2002 1002002 200 2002 5002002 -500i want to get balance of this source_id which is 100+200=300 because (-500+500=0)how can i write a query for this and can i show 100 and 200 saparate in two lines as balanceWhat I have tried:i have two columns source_id and Qty in one table TRANS. Source_id Qty2002 1002002 200 2002 5002002 -500i want to get balance of this source_id which is 100+200=300 because (-500+500=0)how can i write a query for this and can i show 100 and 200 saparate in two lines as balance 解决方案 You should use SQL GROUP BY Statement.SELECT [Source_id], SUM([Qty]) FROM [YourTableName]GROUP BY([Source_id])"and can i show 100 and 200 saparate in two lines as balance"I am unable to understand that. 这篇关于Sql查询减法的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!
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