原文:一个Linq Group By 和Sum的范例

usingSystem usingSystem.Collections.Generic usingSystem.Linq usingSystem.Text usingSystem.IO namespaceConsoleApplication classProgram static voidMain string args varItems newList lt SortItem gt Items ...

2012-09-06 19:16 0 24851 推荐指数:

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LinQ Group By

普通    Sql执行时会取全部数据。 into   Sql执行时会取全部数据。   Select     Sql执行的结果为汇总数据。 多列Group   Sql执行 ...

Sun Apr 29 01:05:00 CST 2018 0 13549
SQL sumgroup by HAVING

Aggregate functions (like SUM) often need an added GROUP BY functionality. 集合函数(类似SUM)经常需要用GROUP BY来进行功能性的补充。 GROUP BY... GROUP BY... was added ...

Wed Aug 24 01:11:00 CST 2016 0 13261
linq to entity group by 时间

CreationTime是DateTime类型 group by 年/月/日/小时 group by 年 group by 小时 其他类推 group by 半小时 group by 半小时=group by 30分钟 group by 半月、半年等等可以类比 参考资料 ...

Wed Oct 30 23:21:00 CST 2019 0 1028
group by 并且 count(1)的linq写法

SELECT [MobleNo],count(1) FROM [CustMobleNo] group by [MobleNo] GO ===作用等于=== var rst = from c in dataContext.CustMobleNo group c by c.MobleNo ...

Thu Feb 16 23:34:00 CST 2017 0 2879
 
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