I have the following table: create table onp_crm_businessfield_company( businessfield_id integer not null references onp_crm_businessfield(id), company_id integer not null references onp_crm_relation(id), is_preferred boolean, UNIQUE(businessfield_id, company_id) );
I want a constraint on "is_preffered" so that it's only allowed to be set once pr. businessfield_id pr. company so that only one businessfield can be preferred for a company. Does anyone have an idea how to enforce this? -- Andreas Joseph Krogh <[EMAIL PROTECTED]> Senior Software Developer / Manager gpg public_key: http://dev.officenet.no/~andreak/public_key.asc ------------------------+---------------------------------------------+ OfficeNet AS | The most difficult thing in the world is to | Hoffsveien 17 | know how to do a thing and to watch | PO. Box 425 Skøyen | somebody else doing it wrong, without | 0213 Oslo | comment. | NORWAY | | Phone : +47 22 13 01 00 | | Direct: +47 22 13 10 03 | | Mobile: +47 909 56 963 | | ------------------------+---------------------------------------------+ ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
