Question

SELECT 
   'Registered End Users' AS 'Report Name',
   'Above Date Range' AS 'Desc',
   CONVERT(VARCHAR, COUNT(*)) AS VALUE
FROM 
    WAPI_CUSTOMERS C
WHERE 
    C.ID NOT IN (SELECT S.CUSTOMER_ID FROM WAPI_SUBSCRIPTIONS S) 
    AND 
       CASE C.BASIC_REG_DATE IS NULL THEN C.FULL_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE
          WHEN C.FULL_REG_DATE IS NULL THEN C.BASIC_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE 
       END

Actually I have two table named wapi_customers and wapi_subscribers. I have have get all rows of customer table which are not in subscriber table between user selected date range.

In customer table I have two types of customers like basic and full.

1. basic customers have isbasic=1 and basicregdate=somedate and isfull=0 and fullregdate=null
2. full customers have isbasic=0 and basicregdate=null and isfull=1 and fullregdate=somedate
3. case which are upgraded from basic to full:
   isbasic=1 and basregdate=somedate and fullregdate=1 and fulldate=somedate

Now I have to count customers which follow the above conditions means in case of basic
we will use C.BASIC_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE and in case of full
C.FULL_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE and in case of upgrade C.FULL_REG_DATE or C.BASIC_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE

Plz help

Answer 1

If I understood you correctly, following is something would work for you:

where
 ( 
            (isbasic = 1 and basicregdate is not null and isfull=0  ) 
            and C.BASIC_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE 
      )
or 
 ( 
            ( isbasic=0 and fullregdate=null and isfull=1 and fullregdate is not null) 
            and C.FULL_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE 
      )
or
(
       (isbasic=1 and basregdate is not null and fullregdate=1)
       and C.BASIC_REG_DATE BETWEEN @FROM_DATE AND @TO_DATE
)