Single null Value B'cse Unique Constraint contain unique value and si

How many null values can be inserted in a coulmn whihc is unique constraint

Question Posted / manish kumar

Answer Posted / manish kumar

Single null Value
B'cse Unique Constraint contain unique value and single
null is also a unique value.

Is This Answer Correct ?

7 Yes

29 No

Please Help Members By Posting Answers For Below Questions

why does the selected column have to be in the group by clause or part of an aggregate function? : Sql dba

1041

What is error ora-01000: maximum open cursors exceeded

1060

what is the difference between primary key and unique key? : Sql dba

969

What is the need of a partition key?

940

Can I copy :old and :new pseudo-records in/to an oracle stored procedure?

1141

how to use 'mysql' to run sql statements? : Sql dba

983

What is dbo in sql?

919

what are the other commands to know the structure of table using mysql commands except explain command? : Sql dba

993

explain the difference between myisam static and myisam dynamic. : Sql dba

884

What is pls_integer in pl sql?

1029

How does stored procedure reduce network traffic?

965

What is asqueryable?

903

How many joins can you have in sql?

880

what is an alias command? : Sql dba

1007

What is the primary use of normalization?

941