Primary key doesnot allow null value but unique key allows null value.

Difference between primary key and unique key ?

Question Posted / pandiyan

Answer Posted / pandiyan

Primary key doesnot allow null value but unique key allows
null value.

Is This Answer Correct ?

1 Yes

0 No

Please Help Members By Posting Answers For Below Questions

How can windows applications connect to oracle servers?

1060

How to install oracle database 10g xe?

1024

How to use regular expression in pattern match conditions in oracle?

1042

How to start a specific oracle instance?

1042

How to speed up webrick?

1080

In oracle there is column command, how will you explain that?

1061

Differentiate between pre-select and pre-query?

1115

Oracle

2380

How do I manually create a database in oracle?

1025

Give the various exception types.

997

interview questions with answer for cts

2590

When do you get a .pll extension in oracle? Explain its importance

1045

How can we force the database to use the user specified rollback segment?

1152

WHAT IS ecc 6.0

2151

What are the data types in oracle?

1044