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

Give syntax for SQL and ORACLE joins.

1092

How to pass a cursor variable to a procedure?

1105

What is blob data type in oracle?

1117

What are the uses of a database trigger?

994

What are temporal data types in oracle?

1119

What happens if you lost a data file?

1034

How to sort the query output in oracle?

1026

Which is better Oracle or MS SQL? Why?

6381

Write a syntax for update query in oracle?

1031

Explain the types of exception?

1143

Explain how you would restore a database using RMAN to Point in Time?

2141

What are set operators?

1079

How to load data through external tables?

1135

How to experiment a data lock in oracle?

1054

How do I limit the number of oracle database connections generated by weblogic server?

1068