Question

I have the following query:

SELECT dm.app_id, apt.app_name, COUNT(dm.app_id) 
FROM dm_openapp dm
JOIN app_table apt ON dm.app_id = apt.app_id
GROUP BY dm.app_id 

Basically this table also has dates associated to each record, and I need to get a range of all the records between time X and Y, I tried using the following, for example, but to no avail:

WHERE dm.dl_time BETWEEN '2011-05-31' AND '2011-05-06'

Any idea as to what to do? the dl_time column is a timestamp type.

Answer 1

Ummm… you’ve got the data the wrong way around. BETWEEN must be LOW value to HIGH value:

Try this:

WHERE dm.dl_time BETWEEN '2011-05-06' AND '2011-05-31' -- Note date values swapped

You can ignore the other answers, which also haven’t noticed this…