Thread: UNIQUE on everything except primary key
I have a table with 11 columns and want to eliminate duplication on INSERTs. What's the best method? The obvious solutionwould be to create a UNIQUE index on everything except the primary key - 'id' - but that's a 10-column index anddoesn't sound very efficient. Am I missing something more obvious? gvim
Did you check check constraints? http://www.postgresql.org/docs/8.4/static/ddl-constraints.html Best Andreas -----Ursprüngliche Nachricht----- Von: pgsql-sql-owner@postgresql.org [mailto:pgsql-sql-owner@postgresql.org] Im Auftrag von gvim Gesendet: Donnerstag, 3. Februar 2011 16:44 An: pgsql sql Betreff: [SQL] UNIQUE on everything except primary key I have a table with 11 columns and want to eliminate duplication on INSERTs. What's the best method? The obvious solutionwould be to create a UNIQUE index on everything except the primary key - 'id' - but that's a 10-column index anddoesn't sound very efficient. Am I missing something more obvious? gvim -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
Do all the 10 columns make a natural key? 03.02.2011, 18:44, "gvim" <gvimrc@gmail.com>: > I have a table with 11 columns and want to eliminate duplication on INSERTs. What's the best method? The obvious solutionwould be to create a UNIQUE index on everything except the primary key - 'id' - but that's a 10-column index anddoesn't sound very efficient. Am I missing something more obvious? > > gvim > > -- > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-sql