分組在LINQ到實體模型

Question

我具有以下在實體模型對象字段

MONTH_CHAR炭（1） AVG_BALANCE INT PROD_CAT_ID INT FLG_PERS_COMM聊天（1） ACCOUNT_COUNT INT

我想組由MONTH_CHAR列，我會寫下面的SQL查詢此

SELECT MONTH_CHAR, SUM(AVG_BALANCE) AS AVG_BALANCE, MAX(PROD_CAT_ID) AS PROD_CAT_ID, MAX(ACCOUNT_COUNT) AS ACCOUNT_COUNT, FROM contactSummary WHERE PROD_CAT_ID = 1 GROUP BY MONTH_CHAR

我想這個查詢是CONV使用LINQ查詢。

在此先感謝

Answer 1

from contact in context.Contacts 
group contact by contact.Month_Char into g 
select new 
{ 
    MonthChar = g.Key, 
    AvgBalance = g.Average(x=>x.Avg_Balance) 
    CatID = g.Max(x=>x.Prod_Cat_ID) 
    AccountCount = g.Max(x=>x.Account_Count) 
}