Question

The table request has foreign key fields job and user. I need to pull the subset of rows for which one user has both a row for both job = 35 and job = 34.

Is this query doing the job correctly? I believe it is.

SELECT * FROM `request` 
WHERE `job` = 35 AND `fulfilled` is NULL 
AND 
`user` IN 
(SELECT `user` FROM `request` WHERE `job` = 34 AND `fulfilled` is NULL )

Answer 1

SELECT user
FROM   request
WHERE  job IN (34,35) AND `fulfilled` is NULL 
GROUP BY user
HAVING COUNT(DISTINCT job) = 2

• SQLFiddle Demo