Can unique have more than one null value?

Answer 1

Yes, a unique column may have more than one null value.

Answer 2

nope, a unique column can't have null value at all😊

Answer 3

unique column can have Null values and multiple ones at that. also primary column is indeed a unique column but there can be multiple unique columns in a table.

Answer 4

nop, unique column cannot contain null values

Answer 5

nope unique key cannot contain null value

Answer 6

Unique column can only contain one null value.