where子句中没有与

Question

工作where子句中没有与工作时，我写了其中Prse =“H”它显示了我一个错误“无效列”

;with cT(FLDID ,FLD10 ,FLD610) 
as 
(
select * from Table556 
inner join Table555 on table555.FLD9=FLD318 
where FLD610=150 
) 

select case when fld609 <=12 then 'h' else 's' end as Prse,* from cT 
where Prse ='h' 

Answer 1

的with无关用它。您只在最后的SELECT子句中引入了Prse - 并且您无法参考WHERE子句中的这些列（因为WHERE在逻辑上运行之前SELECT）。

你想：

;with cT(Prse, FLDID ,FLD10 ,FLD610) 
as 
(
select case when fld609 <=12 then 'h' else 's' end as Prse, * from Table556 
inner join Table555 on table555.FLD9=FLD318 
where FLD610=150 
) 

select * from cT 
where Prse ='h' 

Answer 2

尝试这一个 -

;WITH cte AS 
(
    SELECT 
      FLDID 
     , FLD10 
     , FLD610 
     , Prse = 
      CASE WHEN FLD609 <= 12 
       THEN 'h' 
       ELSE 's' 
      END 
    FROM dbo.Table556 t 
    JOIN dbo.Table555 t2 ON t2.FLD9 = t.FLD318 
    WHERE FLD610 = 150 
) 
SELECT * 
FROM cte 
WHERE Prse = 'h'