what is primary key?

Answer Posted / parthiban.s

primary Key is a unique one.in a table only one primary
key is available. it;s not accepted null values

Is This Answer Correct ?    1 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What happens if the imported table already exists?

543


Is it possible to center an object horizontally in a repeating frame that has a variable horizontal size ?

1872


Explain drop constraint oracle?

589


what is the dual table in oracle?

549


Explain the use of constraints option in exp command.

555






What are the set operators union, union all, minus & intersect meant to do?

557


What privilege is needed for a user to query tables in another schema?

502


How do we represent comments in oracle?

621


how can db_files > maxdatafiles since db_files is for instance and the later is for database

2173


How to initialize variables with default values?

625


What is the scope of a local variable?

577


What are the logical operations?

673


What is the Tune Query

1837


What is a static data dictionary in oracle?

562


What is set operator oracle?

521