Can we use more than one null value for unique key?
Answer Posted / rajesh
yes,we can use more than one null value for unique key.
Bcz all null values are unique,
thing is that null is unknown ,unassignable,
undefind ,inapplicable value and allwase null is not equal
to null and any arithimitic operation and logical
comparision all wase result null
Is This Answer Correct ? | 21 Yes | 9 No |
Post New Answer View All Answers
What are the different sql commands?
How to combine two stored procedures in sql?
Mention what are different methods to trace the pl/sql code?
What is offset in sql query?
What is the difference between local and global temporary table?
What is the difference between clustered and non-clustered index in sql?
What is query syntax?
What are inbuilt functions in sql?
Can we use ddl statements in stored procedure sql server?
What are the conditions an underlying table must satisfy before a cursor can be used by a positioned update or delete statement? : Transact sql
What is clustered index in sql?
What is the difference between microsoft access and sql?
How many indexes can be created on a table in sql?
What is sql*loader and what is it used for?
What is scalar and vector?