Question

I am trying to create a query which returns offers for all rows that belong to a club_id that are within a start_date & end_date, however the query should also return results for any that match the club_id AND the end_date is 0 – any ideas of how to do this?
My current query is below…

SELECT 
    * , 
    UNIX_TIMESTAMP( start_date ) AS start_dateStamp, 
    UNIX_TIMESTAMP( end_date ) AS end_dateStamp 
FROM 
    (`offers`) 
WHERE 
    UNIX_TIMESTAMP(  `start_date` ) <1329308797 
AND 
    UNIX_TIMESTAMP(  `end_date` ) >1329308797 
AND 
    `club_id` =23

Answer 1

SELECT
  `offers`.* ,
  UNIX_TIMESTAMP( start_date ) AS start_dateStamp, 
  UNIX_TIMESTAMP( end_date ) AS end_dateStamp 
FROM `offers`
  WHERE  `club_id` =23
  AND (
    (
      `start_date`<FROM_UNIXTIME(1329308797)
       AND `end_date`>FROM_UNIXTIME(1329308797)
    )
    OR `end_date`=FROM_UNIXTIME(0)
  )

Please note, that I moved the convertion from unix-timestamp to MySQL-date from the field to the constant – this way it has to be converted only once, and not for all rows. Additionally this way an index can be used.

Edit

With “date zero” not being Unix-Zero but MySQL-Zeor the last line should be

OR `end_date`='0000-00-00'

additionally, if the data type of start_date and end_date is not DATETIME but DATE you need

DATE(FROM_UNIXTIME(...))

instead of

FROM_UNIXTIME(...)