Question

I have an interesting problem. I will write a scalar-valued function. One of the parameters isn’t in table columns. I have to use this parameter (@ImpUrgPri) in where clause. As for that parameter, there will be a condition with a column existing in table. Can you help me about that?

DECLARE @ImpUrgPri NVARCHAR(3)
SET @ImpUrgPri = 'URG'
DECLARE @Enum INT
SET @Enum = 0

select COUNT(*) 
from zODYA_vwCallReq_AllData 
where ActiveFlag = 1
AND 
(CASE WHEN (@ImpUrgPri = 'PRI') THEN Priority_Enum == @Enum
        WHEN (@ImpUrgPri = 'URG') THEN Urgency_Enum == @Enum 
        WHEN (@ImpUrgPri = 'IMP') THEN Impact_Enum == @Enum END)

group by 
(CASE WHEN (@ImpUrgPri = 'PRI') THEN Priority_Enum 
        WHEN (@ImpUrgPri = 'URG') THEN Urgency_Enum 
        WHEN (@ImpUrgPri = 'IMP') THEN Impact_Enum END)

Answer 1

Your select could be as:

select COUNT(*) 
from zODYA_vwCallReq_AllData 
where ActiveFlag = 1
AND @Enum =  (CASE WHEN (@ImpUrgPri = 'PRI') THEN Priority_Enum
             WHEN (@ImpUrgPri = 'URG') THEN Urgency_Enum
             WHEN (@ImpUrgPri = 'IMP') THEN Impact_Enum END)

group by 
(CASE WHEN (@ImpUrgPri = 'PRI') THEN Priority_Enum 
        WHEN (@ImpUrgPri = 'URG') THEN Urgency_Enum 
        WHEN (@ImpUrgPri = 'IMP') THEN Impact_Enum END)