unpivot与pivot的联合使用

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select 1 [序号],'张三' [姓名],85 [语文],85 [数学],85 [英语],85 [历史],85 [地理],85 [生物],85 [化学] INTO T UNION ALL

select 2 [序号],'李四' [姓名],85 [语文],85 [数学],85 [英语],85 [历史],85 [地理],85 [生物],85 [化学] UNION ALL

select 3 [序号],'王五' [姓名],85 [语文],85 [数学],85 [英语],85 [历史],85 [地理],85 [生物],85 [化学] UNION ALL

select 4 [序号],'赵六' [姓名],85 [语文],85 [数学],85 [英语],85 [历史],85 [地理],85 [生物],85 [化学]

--读取系统表取列

DECLARE @SQL VARCHAR(8000),@str VARCHAR(1000)

SET @str=(SELECT STUFF((SELECT ',['+name+']' FROM SYS.COLUMNS WHERE OBJECT_ID IN(SELECT OBJECT_ID FROM SYS.TABLES WHERE NAME='T')AND column_id>2 FOR XML PATH('')),1,1,''))

SET @SQL=';SELECT * INTO #T1 FROM T UNPIVOT (VALUE FOR [科目] IN('+@str+'))A

DECLARE @str1 VARCHAR(1000),@SQL1 VARCHAR(8000)

SET@str1=(SELECT STUFF((SELECT '',[''+[姓名]+'']'' FROM (SELECT distinct[姓名] FROM #T1)A FOR XML PATH('''')),1,1,''''))

SET @SQL1=''SELECT [科目],''+@str1+'' FROM (SELECT [姓名],[科目],[value] FROM #T1)B PIVOT(MAX([VALUE]) FOR [姓名] in(''+@str1+''))A''

EXEC(@SQL1)

DROP TABLE #T1

PRINT @SQL

EXEC(@SQL)

DROP TABLE T

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