`GROUP BY`表达

Question

我收到错误消息：

  

Msg 164，Level 15，State 1，Line 18

每个GROUP BY表达式必须包含至少一个不是以下TSQL的外部引用的列：

DECLARE @CLIENT_COUNT INT

SELECT @CLIENT_COUNT=COUNT(CLT_NBR) FROM CLIENT

SELECT 
CASE WHEN STATUS=3 THEN 'CATEGORY1' else 'CATEGORY2' end as Category

,COUNT(*) AS COUNT 

,@CLIENT_COUNT as [Total CLIENT]

,COUNT(*) / @CLIENT_COUNT as PERCENTAGE

FROM CLIENT_STATUS

WHERE STATUS IN (3,8)

GROUP BY STATUS,@CLIENT_COUNT 

你能帮我解决一下吗？

谢谢！