CASE语句导致错误

Question

declare @JANORG int; 
declare @FEBORG int; 
declare @MARORG int; 
declare @APRORG int; 
declare @MAYORG int; 
declare @JUNORG int; 
declare @JULORG int; 
declare @AUGORG int; 
declare @SEPORG int; 
declare @OCTORG int; 
declare @NOVORG int; 
declare @DECORG int; 

select 
    p.orgid, p.projid, bomitem.fk_itemid, p.budgetyear, 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@JANORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@FEBORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@MARORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@APRORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@MAYORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@JUNORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@JULORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@AUGORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@SEPORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@OCTORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@NOVORG)/100 AS INT)), 
    SUM(cast((bom.component_attachrate*bomitem.itemqty*@DECORG)/100 AS INT)) 
from 
    REF_VHF_COMPONENT bom, VHF_COMPONENT_ITEMS bomitem, 
    VHF_PRJFCAST v, VHF_SYSGEN_PROJ p, VHF_ORGPT o 
where 
    bom.pk_ID = bomitem.fk_bomid 
    and p.budgetyear = o.budgetyear 
    and CASE @JANORG WHEN v.JANORG = '0' THEN v.JANORG WHEN v.JANAREA = '0'    THEN  v.JANAREA ELSE p.JANORG END, 
CASE @FEBORG WHEN v.FEBORG <> '0' THEN v.FEBORG WHEN v.FEBAREA <> '0' THEN  v.FEBAREA ELSE p.FEBORG END, 
      CASE @MARORG WHEN v.MARORG <> '0' THEN v.MARORG WHEN v.MARAREA <> '0' THEN v.MARAREA ELSE p.MARORG END, 
CASE @APRORG WHEN v.APRORG <> '0' THEN v.APRORG WHEN v.APRAREA <> '0' THEN v.APRAREA ELSE p.APRORG END, 
CASE @MAYORG WHEN v.MAYORG <> '0' THEN v.MAYORG WHEN v.MAYAREA <> '0' THEN v.MAYAREA ELSE p.MAYORG END, 
CASE @JUNORG WHEN v.JUNORG <> '0' THEN v.JUNORG WHEN v.JUNAREA <> '0' THEN v.JUNAREA ELSE p.JUNORG END, 
CASE @JULORG WHEN v.JULORG <> '0' THEN v.JULORG WHEN v.JULAREA <> '0' THEN v.JULAREA ELSE p.JULORG END, 
CASE @AUGORG WHEN v.AUGORG <> '0' THEN v.AUGORG WHEN v.AUGAREA <> '0' THEN v.AUGAREA ELSE p.AUGORG END, 
CASE @SEPORG WHEN v.SEPORG <> '0' THEN v.SEPORG WHEN v.SEPAREA <> '0' THEN v.SEPAREA ELSE p.SEPORG END, 
CASE @OCTORG WHEN v.OCTORG <> '0' THEN v.OCTORG WHEN v.OCTAREA <> '0' THEN v.OCTAREA ELSE p.OCTORG END, 
CASE @NOVORG WHEN v.NOVORG <> '0' THEN v.NOVORG WHEN v.NOVAREA <> '0' THEN v.NOVAREA ELSE p.NOVORG END, 
CASE @DECORG WHEN v.DECORG <> '0' THEN v.DECORG WHEN v.DECAREA <> '0' THEN v.DECAREA ELSE p.DECORG END 
group by 
    bomitem.fk_itemid, p.orgid, p.projid, bomitem.fk_itemid, p.budgetyear 

我得到一个错误，case语句的语法不正确*

Answer 1

你CASE表达不遵循任何两个适当的格式。要么你可以找出你想要的值进行比较，以一次：

CASE col1 WHEN 'dog' THEN 1 
      WHEN 'cat' THEN 2 
      WHEN 'horse' THEN 3 
END 

或者你可以使用更灵活的形式，其中每个WHEN具有可参考不同领域的综合标准：

CASE WHEN col1 = 'dog' THEN 1 
    WHEN col2 = 'horse' THEN 1 
    WHEN col3 = 'cat' THEN 2 
END 

目前还不清楚你正试图用你的CASE表达式做什么。如果你想使用它们进行过滤，你需要评估对别的东西CASE表达：

WHERE CASE ... END = @variable1 
    AND CASE ... END = @variable2