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
How to run sql commands in sql*plus?
what is the difference between a local and a global temporary table? : Sql dba
What is pl sql in oracle?
What is data type in sql?
What is normalization in a database?
How do you use collections in procedure to return the resultset?
Which table is left in join?
what is commit? : Sql dba
What is group by in sql?
What are different sql data types?
Mention what problem one might face while writing log information to a data-base table in pl/sql?
What is the difference between pl and sql?
table structure: ---------------- col1 col2 ----- ----- 01-mar-2012 11:12:46 01-mar-2012 11:12:10 01-mar-2012 11:12:46 01-mar-2012 11:11:23 Write a query to display the result as shown below: col1 col2 ----- ----- 01-mar-2012 11:12:46 01-mar-2012 11:12:10
what is cursor and its type, what is ref cursor write a syntax to pass ref cursor into procedure out fucntion and call the procedure
What is rollback?