[SQL] Find NOT NULLs in a group of 20 columns
I'm struggling to find anything other than a complex stored proc to do this: Out of a group of 20 columns return the rows in which: 1. Only 1 of the 20 columns IS NOT NULL 2. More than 1 of the 20 columns IS NOT NULL Any ideas? gvim -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
[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 solution would be to create a UNIQUE index on everything except the primary key - 'id' - but that's a 10-column index and doesn'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
[SQL] Add one column to another
I have to deal with a table which contains: first_name surname email1 email2 ... and I would like to create a view which combines both email columns thus: first_name surname email It looks simple but I can't think of an obvious query. gvim -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
