Niklas, Thank you very much, that did the business
Cheers Nigel Bishop -----Original Message----- From: Niklas Johansson [mailto:[EMAIL PROTECTED] Sent: 03 February 2006 13:00 To: Nigel Bishop Cc: pgsql-sql@postgresql.org Subject: Re: [SQL] Help writing a piece of SQL On 3 feb 2006, at 11.43, Nigel Bishop wrote: > The query will have the username and domain passed in as variables. > If the username and domain exist then return the sendto > The bit I'm struggling with is if the username doesn't exist then > return the sendto where the domain exists > > e.g. username=fred (this doesn't exist) and domain=rusty.com then > [EMAIL PROTECTED], [EMAIL PROTECTED], > [EMAIL PROTECTED] I think this could do the trick for you: SELECT sendto FROM users t1 WHERE domain='rusty.com' AND (username='fred') = EXISTS(SELECT 1 FROM users t2 WHERE username='fred' and domain=t1.domain); Sincerely, Niklas Johansson Communications on or through ioko's computer systems may be monitored or recorded to secure effective system operation and for other lawful purposes. Unless otherwise agreed expressly in writing, this communication is to be treated as confidential and the information in it may not be used or disclosed except for the purpose for which it has been sent. If you have reason to believe that you are not the intended recipient of this communication, please contact the sender immediately. No employee is authorised to conclude any binding agreement on behalf of ioko with another party by e-mail without prior express written confirmation. ioko365 Ltd. VAT reg 656 2443 31. Reg no 3048367. All rights reserved. ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
