If a table column has is UNIQUE and has NOT NULL, is it
equivalent to a PRIMARY KEY column?

Answer Posted / eshwari

ur question is not clear.

if ur saying that ur giving unique and not null constraints
to the same column then u can make it as primary key.it
internally supports clustered index also.

if ur saying that ur giving unique and not null constraints
to different columns then u cant make them as primary key
individually.
coz primary key means unique + notnull + clustered index

Is This Answer Correct ?    2 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is oracle rowcount?

565


What is a subquery?

607


How to add a new column to an existing table with a default value?

541


What happens to the current transaction if a ddl statement is executed?

570


What is the difference difference between $ORACLE_HOME and $ORACLE_BASE.

641






can u send the sql dumps to sivakumarr1987@gmail.com plz help me

2586


Which is better Oracle or MS SQL? Why?

5422


How to select an oracle system id (sid)?

575


Is oracle a relational database?

513


How to return top 5 rows in oracle?

538


When system tablespace is created?

593


What is private procedure oracle?

519


How to assign query results to variables?

584


What is the difference between translate and replace?

546


How to drop a tablespace?

561