SQL Server中的Join和Pivot语句

我想从3个表中选择透视和连接

表1:INT、VARCHAR、FLOAT 表2:INT、VARCHAR、FLOAT 表3:INT、VARCHAR、FLOAT 输出表： 我将3个不同表的列的“名称”替换为数字

如何做到这一点？ 我想我得做两个支点？和 unpivot？。。。 我们不知道如何完成它

SELECT *
  FROM (
        SELECT
         t1.a1,
         t1.a2,
         t2.x,
         t3.q
         FROM table1 t1
         INNER JOIN table2 t2
         ON t1.id = t2.id
         ...
   ) Output
   PIVOT (
      name IN (
            ...
      PIVOT(name ... )
      )
  ) PivotTable

更新 以前我有*，我把它改成了除法和和和法，*，只是一个例子，

示例表

create table Table1(ID int, Name varchar(10), value float)
insert table1 select
1 ,'a1', 32116580 union all select
2 ,'a2', 50785384 union all select
3 ,'a3', 54327508 union all select
4 ,'a4', 61030844

create table Table2(ID int, Name varchar(10), value float)
insert Table2 select
1 ,'x11', 61326085092 union all select
2 ,'x12', 80368184260 union all select
3 ,'x13', 83023398776 union all select
4 ,'x14', 91144307692 union all select
5 ,'x22', 95486535484 union all select
6 ,'x23', 90357090612 union all select
7 ,'x24', 100588807668 union all select
8 ,'x33', 707811916752 union all select
9 ,'x34', 93128452928 union all select
10 ,'x44', 84566653668

create table Table3(ID int, Name varchar(10), value float)
insert Table3 select
1 ,'q1', 61326085092 union all select
2 ,'q2', 95486535484 union all select
3 ,'q3', 707811916752 union all select
4 ,'q4', 84566653668

您需要的查询，对于N=4。对于任何其他N，只需使用动态SQL构建查询，更改所需的2行，如**所示

动态版本

declare @Sql nvarchar(max)
select @Sql = ISNULL(@sql + ',', '') + QUOTENAME(RIGHT(number,10))
from master..spt_values
where type='P' and number between 1 and (select COUNT(*) From table1)
set @Sql = '
;with coords(i,row,col,total,N) as (
select 1,1,1,N.N*(N.N+1)/2, N.N
from (select count(*) N from table1) N
union all
select i+1,
       case when col+1>N then row+1 else row end,
       case when col+1>N then row+1 else col+1 end,
       total, N
from coords
where i<total
)
select ' + @sql + '
from
(
    select
        c.row,
        c.col,
        cellvalue= ar.value*ac.value/(qr.value+qc.value+x.value)
    from coords c
    inner join table1 ar on ar.id = c.row
    inner join table1 ac on ac.id = c.col
    inner join table3 qr on qr.id = c.row
    inner join table3 qc on qc.ID = c.col
    inner join table2 x on x.ID = c.i
) p
pivot (max(cellvalue) for col in (' + @sql + ')) pv
order by row
option (maxrecursion 0)  -- ! use with caution
'
exec(@sql)

---

这个网站能帮你吗？这是固定列输出吗？添加行时不添加列？嗯，输出是一个对称矩阵，当我们添加行时，我们可以添加列…您是否希望得到*系列的准确结果？给定您的示例，这些数字是天文数字，不适合任何SQL Server数据类型。事实上，它们可能是它们的总和。一个问题，我尝试将您的解决方案应用于B最大的表，n=25，我得到：Msg 530，级别16，状态1，第2行语句终止。在语句完成之前，已耗尽最大递归100。查询是正常的，它是按照您所说的生成的……所以这个递归不会被打败，对吗？@darkcminor-我添加了选项maxrecursion，它会绕过它。@Richard aka cyberkiwi：我知道这是另一种问题，但使用maxrecursion告诉SQL继续…？？@darkcminor-递归是一种[通用编程]继续返回并重做类似事情的技术。如果您有一个糟糕的查询，它只是简单地说，dox，redox没有任何变化，那么您刚刚创建了一个无限循环。上面的代码实际上总是在达到N*N-1/2后终止，所以它是非常良性的，但是我总是在使用该选项时添加警告。如果N=100000，那么SQL Server将有一个非常大的任务要处理

column1              column2            column3             column4
--------------------------------------------------------------------------
  a1*a1/(q1+q1+x11)  a1*a2/(q1+q2+x12)    a1*a3/(q1+q3+x13)     a1*a4/(q1+q4+x14)
  null               a2*a2/(q2+q2+x22)    a2*a3/(q2+q3+x23)     a2*a4/(q2+q4+x24)
  null               null                 a3*a3/(q3+q3+x339     a3*a4/(q3+q4+x34)
  null               null                 null                  a4*a4/(q4+q4+x44)

SELECT *
  FROM (
        SELECT
         t1.a1,
         t1.a2,
         t2.x,
         t3.q
         FROM table1 t1
         INNER JOIN table2 t2
         ON t1.id = t2.id
         ...
   ) Output
   PIVOT (
      name IN (
            ...
      PIVOT(name ... )
      )
  ) PivotTable

create table Table1(ID int, Name varchar(10), value float)
insert table1 select
1 ,'a1', 32116580 union all select
2 ,'a2', 50785384 union all select
3 ,'a3', 54327508 union all select
4 ,'a4', 61030844

create table Table2(ID int, Name varchar(10), value float)
insert Table2 select
1 ,'x11', 61326085092 union all select
2 ,'x12', 80368184260 union all select
3 ,'x13', 83023398776 union all select
4 ,'x14', 91144307692 union all select
5 ,'x22', 95486535484 union all select
6 ,'x23', 90357090612 union all select
7 ,'x24', 100588807668 union all select
8 ,'x33', 707811916752 union all select
9 ,'x34', 93128452928 union all select
10 ,'x44', 84566653668

create table Table3(ID int, Name varchar(10), value float)
insert Table3 select
1 ,'q1', 61326085092 union all select
2 ,'q2', 95486535484 union all select
3 ,'q3', 707811916752 union all select
4 ,'q4', 84566653668

;with coords(i,row,col,total,N) as (
select 1,1,1,N.N*(N.N+1)/2, N.N
from (select count(*) N from table1) N
union all
select i+1,
       case when col+1>N then row+1 else row end,
       case when col+1>N then row+1 else col+1 end,
       total, N
from coords
where i<total
)
select [1],[2],[3],[4] -- **, e.g. ,[5],[6],etc
from
(
    select
        c.row,
        c.col,
        cellvalue= ar.value*ac.value/(qr.value+qc.value+x.value)
    from coords c
    inner join table1 ar on ar.id = c.row
    inner join table1 ac on ac.id = c.col
    inner join table3 qr on qr.id = c.row
    inner join table3 qc on qc.ID = c.col
    inner join table2 x on x.ID = c.i
) p
pivot (max(cellvalue) for col in ([1],[2],[3],[4])) pv   -- **
order by row

1                      2                      3                      4
---------------------- ---------------------- ---------------------- ----------------------
5606.50338459295       6876.83326310711       2047.51559459649       8269.17991568225
NULL                   9003.55641750708       3087.36780924588       11044.2303130135
NULL                   NULL                   1389.95405212248       3744.35614651666
NULL                   NULL                   NULL                   14681.7678040306

declare @Sql nvarchar(max)
select @Sql = ISNULL(@sql + ',', '') + QUOTENAME(RIGHT(number,10))
from master..spt_values
where type='P' and number between 1 and (select COUNT(*) From table1)
set @Sql = '
;with coords(i,row,col,total,N) as (
select 1,1,1,N.N*(N.N+1)/2, N.N
from (select count(*) N from table1) N
union all
select i+1,
       case when col+1>N then row+1 else row end,
       case when col+1>N then row+1 else col+1 end,
       total, N
from coords
where i<total
)
select ' + @sql + '
from
(
    select
        c.row,
        c.col,
        cellvalue= ar.value*ac.value/(qr.value+qc.value+x.value)
    from coords c
    inner join table1 ar on ar.id = c.row
    inner join table1 ac on ac.id = c.col
    inner join table3 qr on qr.id = c.row
    inner join table3 qc on qc.ID = c.col
    inner join table2 x on x.ID = c.i
) p
pivot (max(cellvalue) for col in (' + @sql + ')) pv
order by row
option (maxrecursion 0)  -- ! use with caution
'
exec(@sql)