Creating Tables The general attributes can be given for any column type, with a few exceptions. You can specify NULL or NOT NULL to indicate whether a column can hold NULL values. For all but BLOB and TEXT types, you can specify DEFAULT def_value to indicate that a column should be assigned the value def_value when a new row is created that does not explicitly specify the column's value.
The value of def_value must be a constant; it cannot be an expression or refer to other columns. === Hello programmers, This is from Mr. Paul DuBois MySQL textbook, Page 101. I'd like to know if this is a definition from the SQL standard, Can this be possible by correct implementation of 'actions', 'triggers' and constrains ? Yours sincerely Morten Gulbrandsen -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
