check out the "set" type instead of enum. http://www.mysql.com/documentation/mysql/bychapter/manual_Reference.html#Column_types http://www.mysql.com/documentation/mysql/bychapter/manual_Reference.html#SET -tcl. On Tue, 20 Feb 2001, [KOI8-R] "Николин Сергей" wrote: > Hello > > I have situation where I can't decide whether to use ENUM type. > Here is a situation: > table contains records about CarID and its colour(s). Each CarID is allowed to have >more than one colour such as red, green, blue. CarID may have just one colour. > This is the code I would use to create table Colours: > > CREATE TABLE Colours( > CarID INT UNSIGNED, > Colour ENUM("red", "green", "blue"), > PRIMARY KEY(CarID)); > > The question is- how can I create a record of a car that has more than one colour? > I also need to link my database with data entry interface, so interface has a tick >boxes corresponding to all colours for a car. > > Currently I have solved the situation this way: > there are three tables Colour, Car and Colours. Table Colour stores ColourID and >ColourName; table Car stores CarID and CarName; table Colours stores CarID and >ColourID, where the primary key is (ColourID, CarID). So I can have more than one >colour (if there is a need for it) for one car. > I can easily pull out colours to the interface, so user is able to select >corresponding colours. > Everything works just fine. > > > Is it a sensible approach not to use ENUM and create "transition" table such as >above (Colours)? Which way is more efficient? > > Your help will be very much appreciated. > Thanks. > > Sergey. > > > --------------------------------------------------------------------- > Before posting, please check: > http://www.mysql.com/manual.php (the manual) > http://lists.mysql.com/ (the list archive) > > To request this thread, e-mail <[EMAIL PROTECTED]> > To unsubscribe, e-mail <[EMAIL PROTECTED]> > Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php > > --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
