On Sat, 2012-07-28 at 08:35 -0700, Lynne Stevens wrote: > > omega > The > Omega sector > America's Last > Line of > Defense > > *That sounds like they will be merged ! . . They are to remain separate > and the "B" file is to be used for a mailing thing after it has the > duplicates removed . . the mailing thing I have figured out and what > fields/columns to use ! !
Hi Lynne, others First - do you want to do this here or on the Ubuntu forums.. :) If this where a relational database and two tables (with the same columns structure) then it is a simple MINUS function: SELECT * FROM TABLE1 MINUS SELECT * FROM TABLE2 That statement will return all records in TABLE1 that are not also in TABLE2. However you have here 2 CSV files, and one of those files IIRC has a column with a different name. I don't thin you told folks here about how you are getting the data. Andreas may have a good way to do that completely in Calc (he is much better at Calc then I ever will be) However is this is something you will need to do on a continuing basis (with new CSV files arriving from time to time) then I would set this up under Base and attach the two CSV files as TEXT tables. With that done, then you can use the MINUS command. It's a little bit of work to set up the connection, but one done you can reuse it just by overwriting the source files with the data as need. //drew > > > > * > > On 07/28/2012 06:38 AM, Andreas Säger wrote: > > Am 28.07.2012 14:17, Lynne Stevens wrote: > >> > >> > >> omega > >> The > >> Omega sector > >> America's Last > >> Line of > >> Defense > >> > >> *How do I check for duplicates in a data base using another data base ? > >> > >> > >> > >> * > >> > >> > > > > SELECT "A".* > > FROM "A" JOIN "B" ON "A"."ID" = "B"."ID" > > > > returns all rows from table A with an equivalent ID in table B. > > > > > > -- For unsubscribe instructions e-mail to: users+h...@global.libreoffice.org Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/users/ All messages sent to this list will be publicly archived and cannot be deleted
