G'day John, A number of years ago I purchased "Advanced SQL Queries" by David Blocker & Bill Downall which was a course notebook and exercises based on 4.5 - they may have a more up to date version but the principles are still the same.
Regards Clive Williams > -----Original Message----- > From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of John > Docherty > Sent: Sunday, 6 April 2008 11:37 > To: RBASE-L Mailing List > Subject: [RBASE-L] - Re: IF with SELECT > > Thanks Emmitt - that sorts that out. > > I was looking at purchasing an SQL reference book a while ago but > wasn't > sure which to choose, so ended up with nothing. Do you, or anyone else, > have > any suggestions in that regard ? > > Regards, > > John Docherty > > -----Original Message----- > From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Emmitt > Dove > Sent: Sunday, 6 April 2008 1:25 p.m. > To: RBASE-L Mailing List > Subject: [RBASE-L] - Re: IF with SELECT > > Since the IF .. THEN construct isn't part of SQL, a SQL SELECT is out > of > place there. > > Emmitt Dove > Manager, DairyPak Business Systems > Evergreen Packaging, Inc. > [EMAIL PROTECTED] > [EMAIL PROTECTED] > (203) 643-8022 > > -----Original Message----- > From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of John > Docherty > Sent: Saturday, April 05, 2008 9:03 PM > To: RBASE-L Mailing List > Subject: [RBASE-L] - Re: IF with SELECT > > Albert, > > Thanks for your reply. I had changed my routine as you have suggested, > but > it would be handy if you could do it the other way ? > > Regards, > > John Docherty > > -----Original Message----- > From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Albert > Berry > Sent: Sunday, 6 April 2008 9:22 a.m. > To: RBASE-L Mailing List > Subject: [RBASE-L] - Re: IF with SELECT > > John, you can > SELECT COUNT(*) INTO vsCount FROM sections WHERE sno = .vsno > IF vsCount > 0 THEN > -- whatever > ENDIF > > AFIK the IF statement does not allow embedded SELECT clauses in R:Base > > > John Docherty wrote: > > I am wanting to base an IF statement on the existence of a number in > a > > table, > > however I receive the following error with my attempt, which is > > > > IF vsnew IN (SELECT secno FROM sections WHERE sno=.vsno) THEN .. > > > > -ERROR- Sub-SELECTs are not supported by this command. (2310) > > > > I was wondering if the only way of achieving this to do a SELECT INTO > (or > > similar) to determine if any values exist that meet the criterion or, > is > > this possible, but my statement is incorrect ? > > > > Any suggestions would be much appreciated. > > > > > > > > > > > __________ NOD32 3004 (20080405) Information __________ > > This message was checked by NOD32 antivirus system. > http://www.eset.com
