primary key is the unique value,but its not nul values.. this kry is avoid

what is the difference between primary key & foreign key?

Question Posted / mithun

Answer Posted / mithun

primary key is the unique value,but its not nul values..
this kry is avoided dublicate values

foreign key is always references the primary key.

Is This Answer Correct ?

21 Yes

8 No

Please Help Members By Posting Answers For Below Questions

List out the difference between commit, rollback, and savepoint?

1050

How to use null as conditions in oracle?

1094

What are the types of trigger in oracle?

993

Which dictionary view(s) would you first look at to understand or get a high-level idea of a given Advanced Replication environment?

1892

How would you begin to troubleshoot an ORA-3113 error?

2090

Give the different types of rollback segments.

1039

How does oracle handle read consistency?

1106

What is the parameter mode that can be passed to a procedure?

1062

How to do a full database export?

1119

Explain the use of grant option in exp command.

1071

How to run queries on external tables?

1056

How do you bind variables in oracle?

990

what is reindexing?

1688

Which dictionary tables and/or views would you look at to diagnose a locking issue?

1919

What is the difference between sharding and replication?

1062