在使用where子句的情况下使用T Sql Case

Question

尝试使用WHERE BETWEEN执行CASE WHEN：

SET @Qtr1 = datepart(MONTH,@dt1)
select 
SUM(QtyInvoiced) as QtrCase
,CustName
,Town
,Rep
from SalesSumNew 
where
FinMonth between
case when @Qtr1 between '1' and '3' THEN '10' and '12'
,case when @Qtr1 between '4' and '6' THEN '1' and '3'
,case when @Qtr1 between '7' and '9' THEN '4' and '6'
,case when @Qtr1 between '10' and '12' THEN '7' and '9'
end
group by CustName, Town, Rep
order by Town

导致错误：

  

Msg 156，Level 15，State 1，Line 57
  关键字'和'附近的语法不正确。

Answer 1

你做不到。

尝试使用maths和mod计算范围：类似......

where FinMonth between 
((((2+@qtr1)/3)+2)*3)%12+1,
and
((((2+@qtr1)/3)+2)*3+2)%12+1

如果你的FinMonth真的是一个字符串字段，那么'10'，'11'，'12'都在'1'和'3'之间