On Tuesday 02 January 2007 16:51 Brent Baisley's cat, walking on the keyboard, wrote:
> CREATE TABLE competenza ( > competenza varchar(30) NOT NULL default 'comp-06-', > id_competenza int unsigned not null auto_increment, > descrizione varchar(100), > PRIMARY KEY (competenza, id_competenza) > ) > > Since your PRIMARY KEY is a combination of 2 fields (competenza + > id_competenza ), each competenza value will have it's own auto increment > (id_competenza ) sequence. So id_competenza won't be unique, but the > combination of competenza + id_competenza will be. > Thanks for your suggestion, but this would make my queries more complex, since to get the id of a skill (italian is competenza) will require querying two fields. It's true that I can simulate sequences with a table with auto_increment, but this means I need to insert a record before in such table to get the new id and then insert in my competenza table. This would require a transaction and will result even more complex than the above, I guess. Any other idea? Thanks, Luca -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
