table_sourcePIVOT(聚合函数（value_column）FOR pivot_columnIN(<column_list>))

table_sourceUNPIVOT(value_columnFOR pivot_columnIN(<column_list>))

ifobject_id(‘tb‘)isnotnulldroptabletbgoCreate table tb(姓名 varchar(10),课程 varchar(10),分数 int)Insert into tb values(‘张三‘,‘语文‘,74)Insert into tb values(‘张三‘,‘数学‘,83)Insert into tb values(‘张三‘,‘物理‘,93)Insert into tb values(‘李四‘,‘语文‘,74)Insert into tb values(‘李四‘,‘数学‘,84)Insert into tb values(‘李四‘,‘物理‘,94)goSelect * from tb

 select姓名, Max (case课程when‘语文‘then分数else 0 end)语文, Max (case课程when‘数学‘then分数else 0 end)数学, Max (case课程when‘物理‘then分数else 0 end)物理From tbGroup by姓名

declare@sqlvarchar(500)set@sql=‘select姓名‘select@sql=@sql+‘,max(case课程when ‘‘‘+课程+‘‘‘ then分数else 0 end)[‘+课程+‘]‘from(selectdistinct课程fromtb)a--同from tb group by课程，默认按课程名排序set@sql=@sql+‘ from tb group by姓名‘exec(@sql)

declare@sqlvarchar(8000)select@sql=isnull(@sql+‘,‘,‘‘)+‘ max(case课程when ‘‘‘+课程+‘‘‘ then分数else 0 end) [‘+课程+‘]‘from(selectdistinct课程fromtb)asa      set@sql=‘select姓名,‘+@sql+‘ from tb group by姓名‘exec(@sql)

select*fromtb pivot(max(分数)for课程in(语文,数学,物理))a

--使用stuff()declare@sqlvarchar(8000)set@sql=‘‘  --初始化变量@sqlselect@sql=@sql+‘,‘+课程fromtbgroupby课程--变量多值赋值set@sql=stuff(@sql,1,1,‘‘)--去掉首个‘,‘set@sql=‘select * from tb pivot (max(分数) for课程in (‘+@sql+‘))a‘exec(@sql) --或使用isnull()declare@sqlvarchar(8000)–-获得课程集合select@sql=isnull(@sql+‘,‘,‘‘)+课程fromtbgroupby课程           set@sql=‘select * from tb pivot (max(分数) for课程in (‘+@sql+‘))a‘exec(@sql)

select姓名,max(case课程when‘语文‘then分数else0end)语文,max(case课程when‘数学‘then分数else0end)数学,max(case课程when‘物理‘then分数else0end)物理,sum(分数)总分,cast(avg(分数*1.0)asdecimal(18,2))平均分fromtbgroupby姓名

--SQL SERVER 2000动态SQLdeclare@sqlvarchar(500)set@sql=‘select姓名‘select@sql=@sql+‘,max(case课程when ‘‘‘+课程+‘‘‘ then分数else 0 end)[‘+课程+‘]‘from(selectdistinct课程fromtb)aset@sql=@sql+‘,sum(分数)总分,cast(avg(分数*1.0) as decimal(18,2))      平均分from tb group by姓名‘exec(@sql)

selectm.*,n.总分,n.平均分from(select*fromtb pivot(max(分数)for课程in(语文,数学,物理))a)m,(select姓名,sum(分数)总分,cast(avg(分数*1.0)asdecimal(18,2))平均分fromtbgroupby姓名)nwherem.姓名=n.姓名 

declare@sqlvarchar(8000)set@sql=‘‘  --初始化变量@sqlselect@sql=@sql+‘,‘+课程fromtbgroupby课程--变量多值赋值--同select @sql = @sql + ‘,‘+课程from (select distinct课程from tb)aset@sql=stuff(@sql,1,1,‘‘)--去掉首个‘,‘set@sql=‘select m.* , n.总分,n.平均分from(select * from (select * from tb) a pivot (max(分数) for课程in (‘+@sql+‘)) b) m ,(select姓名,sum(分数)总分, cast(avg(分数*1.0) as decimal(18,2))平均分from tb group by姓名) nwhere m.姓名= n.姓名‘exec(@sql) --或使用isnull()declare@sqlvarchar(8000)select@sql=isnull(@sql+‘,‘,‘‘)+课程fromtbgroupby课程set@sql=‘select m.* , n.总分,n.平均分from(select * from (select * from tb) a pivot (max(分数) for课程in (‘+ @sql+‘)) b) m ,(select姓名,sum(分数)总分, cast(avg(分数*1.0) as decimal(18,2))平均分from tb group by姓名) nwhere m.姓名= n.姓名‘exec(@sql)

ifobject_id(‘tb‘)isnotnulldroptabletbgocreatetabletb(姓名varchar(10),语文int,数学int,物理int)insertintotbvalues(‘张三‘,74,83,93)insertintotbvalues(‘李四‘,74,84,94)goselect*fromtb

--SQL SERVER 2000静态SQL。select*from( select姓名,课程=‘语文‘,分数=语文fromtb unionall select姓名,课程=‘数学‘,分数=数学fromtb unionall select姓名,课程=‘物理‘,分数=物理fromtb) torderby姓名,case课程when‘语文‘then1when‘数学‘then2when‘物理‘then3end

--SQL SERVER 2000动态SQL。--调用系统表动态生态。declare@sqlvarchar(8000)select@sql=isnull(@sql+‘ union all ‘,‘‘)+‘ select姓名, [课程]=‘+quotename(Name,‘‘‘‘)+‘ , [分数] = ‘+quotename(Name)+‘ from tb‘fromsyscolumnswhereName!=‘姓名‘andID=object_id(‘tb‘)--表名tb，不包含列名为姓名的其他列orderbycolidexec(@sql+‘ order by姓名‘)

--SQL SERVER 2005动态SQLselect姓名,课程,分数fromtb unpivot (分数for课程in([语文],[数学],[物理])) t

--SQL SERVER 2005动态SQLdeclare@sqlnvarchar(4000)select@sql=isnull(@sql+‘,‘,‘‘)+quotename(Name)fromsyscolumnswhereID=object_id(‘tb‘)andNamenotin(‘姓名‘)orderbyColidset@sql=‘select姓名,[课程],[分数] from tb unpivot ([分数] for [课程] in(‘+@sql+‘))b‘exec(@sql)