HomeSQL SERVER INTERVIEW QUESTIONSHow many LONG data type columns are allowed in a table? How many LONG data type columns are allowed in a table? 0 Vikas 22:58 Only one column can have LONG data type. And that column cannot be used in "WHERE" clause or in "ORDER BY" clause. Also we cannot add primary key constraint to that column. Tags MS SQL SERVER SQL SERVER SQL SERVER INTERVIEW QUESTIONS Newer Older