How many null values can be inserted in a coulmn whihc is unique constraint
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 |
Post New Answer View All Answers
What are the uses of sysdate and user keywords?
What are sql*plus environment variables?
What is scalar function in sql?
What is varray in pl sql?
list out some tools through which we can draw e-r diagrams for mysql. : Sql dba
What are the most important ddl statements in sql?
What are the various restrictions imposed on view in terms of dml?
What is a clob in sql?
How do I make sql search faster?
What does varchar include?
What is the maximum number of columns in sql table?
How do I run a query in pl sql developer?
differentiate between float and double. : Sql dba
what are all types of user defined functions? : Sql dba
Explain the types of joins in sql?