What will happen if we try inserting two nulls in a column having a unique constraint on it?

What will happen if we try inserting two nulls in a column having a un

1.	What will happen if we try inserting two nulls in a column having a unique constraint on it?
Answer» SINCE a null value is not equal to another null value, inserting two null values on a column with a unique constraint does not throw any ERROR. It SIMPLY inserts the DATA.