BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  MySQL CAST function          BorlandTalk.com Forum Index -> Delphi Databases (SQL Servers) View previous topic :: View next topic   Author Message Tim Guest Posted: Mon Oct 16, 2006 8:11 am    Post subject: MySQL CAST function I want to create a select statement which includes a calculated field along the lines of: select d.*, (adate - d.days_before_departure) from departures d which might be used to give a list of people to send documents a certain number of days before they fly. I have tried cast('2007-01-01' as date) - d.days_before_departure, but it only returns the year part minus the d.days_before_departure value. Also, I want the result field to have a specific name, such as send_date. Normally, I would use (adate - d.days_before_departure) as send_date, but using the cast method above, it gives an error. Can anyone tell me how to make this work? Thanks. Back to top Guillem Guest Posted: Mon Oct 16, 2006 2:13 pm    Post subject: Re: MySQL CAST function Tim wrote: Quote: I want to create a select statement which includes a calculated field along the lines of: select d.*, (adate - d.days_before_departure) from departures d which might be used to give a list of people to send documents a certain number of days before they fly. I have tried cast('2007-01-01' as date) - d.days_before_departure, but it only returns the year part minus the d.days_before_departure value. Also, I want the result field to have a specific name, such as send_date. Normally, I would use (adate - d.days_before_departure) as send_date, but using the cast method above, it gives an error. Can anyone tell me how to make this work? Thanks. Try this (untested) select d.*, DATE_SUB(adate, INTERVAL d.days_before_departure DAY) from departures d -- Best regards :) Guillem Vicens Meier Dep. Informatica Green Service S.A. www.clubgreenoasis.com -- Contribute to the Indy Docs project: http://docs.indyproject.org -- In order to contact me remove the -nospam Back to top Tim Guest Posted: Tue Oct 17, 2006 4:26 pm    Post subject: Re: MySQL CAST function Thanks Guillem, I was not aware of the date_sub function, but have looked it up in the documentation. Your example works fine anyway. Tim "Guillem" <guillemvicens-nospam (AT) clubgreenoasis (DOT) com> wrote in message news:45334d33$1 (AT) newsgroups (DOT) borland.com... Quote: Try this (untested) select d.*, DATE_SUB(adate, INTERVAL d.days_before_departure DAY) from departures d -- Best regards :) Guillem Vicens Meier Dep. 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