Sat, 4 Dec 2010 13:24:27 +0000 Miguel Vaz <pagongski@xxxxxxxxx> > Your solution seems great and does the trick, but if most (and having > some items that relate to all 3 tables) of my relations are between > two tables, close to 1/3 of the id_tx fields would be null, correct? > I may be wrong in thinking like this, but always had this thing of > keeping tables very tight regarding null entries. Am i thinking > wrong? Or maybe worrying too much on less important things. :-) Well, test it. EXPLAIN is a cool thing. http://www.postgresql.org/docs/9.0/static/sql-explain.html http://explain.depesz.com/ http://explain.depesz.com/help/ You can do some optimisation and significantly improve performance of particular SELECT queries by creating proper indexes. I would not be too worried about the NULLs. I do not know, how much data and how large database we are talking about. Maybe you should consult someone more experienced. I only work with small databases: 2 GB of data, less than a million rows per table. Oh, and I am CC'ing the mailing list. ;) Cheers! -- MichaÅ Roszka mike@xxxxxxxxxxxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
