Monthly Archives: April 2014

Answer – Objective Question (How many Null values in an unique constraint can be inserted in SQL Server)

By | April 8, 2014

Question:- How many NULL value allowed in a column in which Unique constraint is defined in SQL Server? Options:- a) 1 b) 2 c) More than 1 Answer :- Option a) 1 In SQL Server, we can Insert only one null value in a column where we have defined the Unique Constraint. For Example , suppose… Read More »