Re: SELECT

Ron Piggott (PHP wrote: > Yesterday I asked how to get the date & time 90 minutes ago and I > received several responses. Thanks. > > I don't think this select statement is working "correctly". (Correctly > being what I am intending it to do) > > I took a look at the table this morning. One record remains that was > created 2006-01-19 at 23:55:37. These are the values of date_created > and time_created. The current values are approximately 2006-01-20 and > 05:50:00 > > This is the select statement I am writing about: > > SELECT * FROM table WHERE > date_created <= '$date_90_minutes_ago' AND > time_created <= '$time_90_minutes_ago' > > Intellectually I know the problem: 05:50:00 is much earlier than > 23:55:37 ... thus my AND is not allowing both conditions to exist > together. > > Is there a way that I may modify this SELECT statement so the present > conditions continue to exist and add a second part to the SELECT > statement that if the time is 01:30:00 or higher that records from the > previous day are selected? This continues to allow the 90 minute time > frame for users logged into my web site ... I am not sure how you would > add an OR function to the above without messing up what presently > works :) > > (I am writing a SESSION function for my web site using mySQL and a cron. > The select statement I quoted above is part of the cron.) > > Ron It would seem you have different columns for date and time? Seems to me that a little judicious use of CONCAT and DATE_SUB might solve your problem. In other words, create a valid date/timestamp value with CONCAT then use DATE_SUB to determine -90 min. I've given a Mysql based solution as this is php.db :-) Cheers -- David Robley "I'm an ordained minister," said Tom reverently.