SQLピボットテーブル

Question

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上記の画像からSQLの質問をご覧ください。

これはどのようにSQLを記述するのですか？

Answer 1

DECLARE @Columns nvarchar(MAX),@SQL nvarchar(MAX); 
SET @Columns=N''; 
SELECT @Columns+=IIF(@Columns='', 
QUOTENAME(continent),N','+QUOTENAME(continent)) 
from(Select continent from student group by continent) as x ; 
Set @SQL=N'SELECT ['+STUFF(@Columns,1,1,'')+' 
FROM (Select continent,name,row_number() over(partition by continent order 
by name) rn from student) AS j 
PIVOT(MAX(name) FOR continent IN (['+STUFF(@Columns,1,1,'')+')) as p'; 
EXECUTE sp_executesql @SQL;