case statement

[rkiss]

Hi

I have the following case statement, but I am not getting the desired results. I would like the results to return a single row for each fname, lname, email with 'Y' or 'N' values for the WEBCAST_1...4.

Right now I get multiple rows where fname, lname, email has different value for WEBCAST_1, 2, 3 and 4.


How can I group it so one row will show wether fname, lname, email attended more than one WEBCAST?



SELECT distinct fname, lname, email,

(CASE when web_cast_id = 1 then 'Y' else 'N' end) WEBCAST_1,
(CASE when web_cast_id = 2 then 'Y' else 'N' end) WEBCAST_2,
(CASE when web_cast_id = 3 then 'Y' else 'N' end) WEBCAST_3,
(CASE when web_cast_id = 4 then 'Y' else 'N' end) WEBCAST_4

FROM marketing_leads.web_cast


Thank You

[chrisrlong]

Try:

SELECT 
   fname, 
   lname, 
   email,
   CASE WHEN SUM(CASE WHEN web_cast_id = 1 THEN 1 END) = 0 THEN 'N' ELSE 'Y' END WEBCAST_1,
   CASE WHEN SUM(CASE WHEN web_cast_id = 2 THEN 1 END) = 0 THEN 'N' ELSE 'Y' END WEBCAST_2,
   CASE WHEN SUM(CASE WHEN web_cast_id = 3 THEN 1 END) = 0 THEN 'N' ELSE 'Y' END WEBCAST_3,
   CASE WHEN SUM(CASE WHEN web_cast_id = 4 THEN 1 END) = 0 THEN 'N' ELSE 'Y' END WEBCAST_4
FROM 
   marketing_leads.web_cast
GROUP BY
   fname, 
   lname, 
   email

- Chris

[rkiss]

Thanks for reply,

Your script returned Y for all WEBCAST1...4

Actaully this one worked.

SELECT DISTINCT fname, lname, email,


max((CASE when web_cast_id = 1 then 'Y' else 'N' end)) AS WEBCAST_1,

max((CASE when web_cast_id = 2 then 'Y' else 'N' end)) AS WEBCAST_2,

max((CASE when web_cast_id = 3 then 'Y' else 'N' end)) AS WEBCAST_3,

max((CASE when web_cast_id = 4 then 'Y' else 'N' end)) AS WEBCAST_4


FROM marketing_leads.web_cast

group by fname, lname, email



Thanks for your help