Hi, Ok, naow i have this:
CREATE TABLE wl_users(wl_user_id INT NOT NULL AUTO_INCREMENT, name VARCHAR(255) NOT NULL, email VARCHAR(50) NOT NULL, password VARCHAR(32) NOT NULL, PRIMARY KEY (wl_user_id, name, email, password)) TYPE=MyISAM; and it lets repeated rows. How can i avoid the repeates rows ? Best Regards, Deckard Paul DuBois wrote: > At 22:11 +0100 10/8/06, Deckard wrote: >> Hi, >> >> How do i dreate a table, let's say: >> >> CREATE TABLE wl_articles(wl_articles_id INT NOT NULL AUTO_INCREMENT >> PRIMARY KEY, title TEXT NOT NULL, >> main TEXT NOT NULL, extended TEXT NOT NULL, permalink >> VARCHAR(255) NOT NULL, date DATE NOT NULL, ip VARCHAR(15), user_agent >> VARCHAR(50), status INTEGER NOT NULL, >> password VARCHAR(32) NOT NULL) TYPE=MyISAM; >> >> without allowing INSERTs to repeat rows based on certain fields, for >> example, "main" and "status" ? > > Normally, you would do this by creating a UNIQUE index on the combination > of columns. (Or you could use a PRIMARY KEY if both columns are NOT NULL.) > > However, you cannot do what you want in this case. Why? Because main is > a TEXT column, and TEXT columns allow a maximum of 255 initial characters > to be indexed. That means you cannot use a UNIQUE index to provide a > uniqueness constraint on anything from the 256th character on. > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
