And if you want to make it a bit faster, this is especially the case when the column contains the same values a number of times, as with road.
Select Columns: * from Tables: TableA where Condition: NOT FieldA IN(SELECT FieldB FROM TableB Group By FieldB) HTH, Peter ------------------------------------------------------------------------------------------------ Peter Horsbøll Møller, GIS Udviklingskonsulent / GIS-Developer Kampsax A/S - GIS Software & Solutions Rugaardsvej 55, 5000 Odense, DK tel: +45 6313 5013, dir:+45 6313 5008, fax: +45 6313 5090 mailto:[EMAIL PROTECTED] www.kampsax-gis.dk and www.kampsax.dk Authorized MapInfo Partner & Distributor in Denmark and Norway. ------------------------------------------------------------------------------------------------ Klik ind på http://www.kortal.dk og se det hele lidt fra oven! ----- Videresendt af Peter Møller/Kampsax - 01-03-2002 08:02 ----- "Fast, Tim" <[EMAIL PROTECTED]> Til: "'Morrier, Steve'" <[EMAIL PROTECTED]>, "MapInfo-L Sendt af: (E-mail)" <[EMAIL PROTECTED]> [EMAIL PROTECTED] cc: onsmag.com Vedr.: RE: MI-L SQL Help 28-02-2002 18:13 Besvar venligst til "Fast, Tim" Steve, Not to worry, you won't get fired. Remember we are the ones who actually do the work! Here is a method for selecting records in one table that do not match records in another table. Consider a situation where we must find all the records in TableA whose values in FieldA do not match the values of FieldB of records in TableB. Fill out the first 3 fields in the SQL Select Dialog box: Select Columns: * from Tables: TableA where Condition: NOT FieldA IN(SELECT FieldB FROM TableB) Hope this helps Tim Fast Pioneer Hi-Bred International -----Original Message----- From: Morrier, Steve [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 28, 2002 10:13 AM To: '[EMAIL PROTECTED]' Subject: MI-L SQL Help This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. Hi all, I have what I thought would be an easy query but it is giving me problems. I have 2 street files, one new and one old. They have roughly the same structure with the old table having a few extra columns of data at the end. I would simply like to run a query to determine what Street Names exists in the new file that are not in the old file, or visa versa. I thought I could run a Where: New.Street_name <> Old.Street_name but this isn't working, I get an INVALID JOIN Clause error. If I swap the <> with = in hopes to invert the selection I get a table with 10 times the amount of records of the originals but no JOIN error. What am I doing wrong? Thanks for all your help, if it wasn't for this list I think I would have been fired years ago!! ;-) Steve _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body. _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body. _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body.
