重新分組的多行成一個

Question

比方說，我有這個表，我開始使用查詢

我工作的查詢，可以給像這樣

這是我到目前爲止所嘗試的：

Select [First Name], [Last Name], Club, 
case when Competition='La Liga' then Wins end as [La Liga], 
case when Competition='Copa del Rey' then Wins end as [Copa del Rey], 
case when Competition='Supercopa de Espana' then Wins end as [Supercopa de Espana],  
case when Competition='UEFA Champions League' then Wins end as [UEFA Champions League], 
case when Competition='UEFA Super Cup' then Wins end as [UEFA Super Cup], 
case when Competition='FIFA Club World Cup' then Wins end as [UEFA Super Cup] 

From dbo.Table 
Group by [First Name], [Last Name], Club 

但我得到'SQL執行錯誤'列'dbo.Wins'在選擇列表中無效，因爲它不包含在聚合函數或GROUP BY子句中。 列'dbo.Competition'在選擇列表中無效，因爲它不包含在聚合函數或GROUP BY子句中。

在GROUP BY子句中放置列'Wins'和'Competition'不會給出我想要的結果。

其他建議？

在此先感謝

Answer 1

您需要添加SUM，MIN，或MAX它，像這樣：

Select [First Name], [Last Name], Club, 
SUM(case when Competition='La Liga' then Wins end) as [La Liga], 
SUM(case when Competition='Copa del Rey' then Wins end) as [Copa del Rey], 
SUM(case when Competition='Supercopa de Espana' then Wins end) as [Supercopa de Espana],  
SUM(case when Competition='UEFA Champions League' then Wins end) as [UEFA Champions League], 
SUM(case when Competition='UEFA Super Cup' then Wins end) as [UEFA Super Cup], 
SUM(case when Competition='FIFA Club World Cup' then Wins end) as [UEFA Super Cup] 

From dbo.Table 
Group by [First Name], [Last Name], Club 

你不能在SQL Server中留下未聚集的項目組中的查詢，即使您知道每個項目最多隻有一個非空項目。