如何在Sql Server中的列中進行分組select

Question

我是sqlserver中的新手。我有一個名爲UserTransactions的表。

WinnerWeek UserGSM 
w1   1000000001 
w2   1000000002 
w2   1000000003 
w2   1000000002 
w2   1000000003 
w2   1000000003 
w2   1000000003 
w3   1000000004 
w3   1000000005 
w3   1000000005 
w3   1000000005 
w4   1000000005 
w4   1000000002 

我想產生如下所示的輸出。但是，我該怎麼做。請儘可能給我sql查詢，謝謝。

WinnerWeek UserGSM  WeeklyCount 
w1   1000000001  1 
w2   1000000002  2 
w2   1000000003  4 
w3   1000000004  1 
w3   1000000005  3 
w4   1000000005  1 
w4   1000000002  1 

Answer 1

SELECT WinnerWeek, UserGSM AS SmsSending, Count(*) 
FROM UserTransactions 
GROUP BY WinnerWeek, UserGSM 

Answer 2

您可以直接GROUP BY和得到這個數：

Select WinnerWeek, SmsSending, Count(*) from yourtable 
    group by WinnerWeek, SmsSending 

Answer 3

GROUP BY和ORDER BY將共同向得到這個給你。

SELECT 
    winnerweek 
    ,usergsm 
    ,COUNT(*) AS weeklycount 
FROM UserTransactions 
GROUP BY 
    winnerweek 
    ,usergsm 
ORDER BY winnerweek 

請仔細閱讀以下內容，以便理解。

GROUP BY：https://docs.microsoft.com/en-us/sql/t-sql/queries/select-group-by-transact-sql

ORDER BY：https://docs.microsoft.com/en-us/sql/t-sql/queries/select-order-by-clause-transact-sql

Answer 4

SELECT 
    WinnerWeek 
    ,usergsm,count(WinnerWeek) as WeeklyCount 
FROM usertransactions 
GROUP BY WinnerWeek,usergsm 

'ID' 應在表的主鍵