各位用户为了找寻关于一句Sql把纵向表转为横向表，并分别分组求平均和总平均值的资料费劲了很多周折。这里教程网为您整理了关于一句Sql把纵向表转为横向表，并分别分组求平均和总平均值的相关资料，仅供查阅，以下为您介绍关于一句Sql把纵向表转为横向表，并分别分组求平均和总平均值的详细内容

效果如图所示: 测试sql语句如下:

代码如下:

declare @tab table(Class varchar(20),Student varchar(20),Course varchar(50),Quantity decimal(7,2));  insert into @tab(Class,Student,Course,Quantity) values('A班','张三','语文',60);  insert into @tab(Class,Student,Course,Quantity) values('A班','张三','数学',70);  insert into @tab(Class,Student,Course,Quantity) values('A班','张三','英语',80);  insert into @tab(Class,Student,Course,Quantity) values('A班','李四','语文',30);  insert into @tab(Class,Student,Course,Quantity) values('A班','李四','数学',40);  insert into @tab(Class,Student,Course,Quantity) values('A班','李四','英语',50);  insert into @tab(Class,Student,Course,Quantity) values('B班','王五','语文',65);  insert into @tab(Class,Student,Course,Quantity) values('B班','王五','数学',75);  insert into @tab(Class,Student,Course,Quantity) values('B班','王五','英语',85);  insert into @tab(Class,Student,Course,Quantity) values('B班','赵六','语文',35);  insert into @tab(Class,Student,Course,Quantity) values('B班','赵六','数学',45);  insert into @tab(Class,Student,Course,Quantity) values('B班','赵六','英语',55);  select * from @tab  select  (case when Grouping(Class)=1 then '总平均' when Grouping(Student)=1 then '' else Class end ) as Class  ,(case when Grouping(Class)=1 then '' when Grouping(Student)=1 then '平均' else Student end) as Student  ,avg(语文) as 语文  ,avg(数学) as 数学  ,avg(英语) as 英语  ,avg(总分) as 总分  from (  select Class,Student  ,(select isnull(sum(Quantity),0) from @tab where Class=t.Class and Student=t.Student and Course='语文') as '语文'  ,(select isnull(sum(Quantity),0) from @tab where Class=t.Class and Student=t.Student and Course='数学') as '数学'  ,(select isnull(sum(Quantity),0) from @tab where Class=t.Class and Student=t.Student and Course='英语') as '英语'  ,(select isnull(sum(Quantity),0) from @tab where Class=t.Class and Student=t.Student) as '总分'  from @tab as t  group by Class,Student  ) as tempTab  group by Class,Student,语文,数学,英语,总分 with rollup  having Grouping(语文)=1  and Grouping(数学)=1  and Grouping(英语)=1