what is the difference between primary key & foreign key?
- 57 Answers
- 122432 Views
- CTS, Infosys, La Multi, Sparsh, Wipro, I also Faced
- E-Mail Answers
Answer Posted / altaf ali
primary key of a relation is a candidate key that has been
designated as the main key.It doesn't has null value.
A foreign key is an attribute in a relation that can be
used as a key to another relation.It allow null and
duplicate value.
| Is This Answer Correct ? | 16 Yes | 5 No |
Post New Answer View All Answers
How to install oracle database 10g xe?
How to set a transaction to be read only in oracle?
what are bitmap indexes? How does they work?
Write a trigger example in oracle?
What is the simplest tool to run commands on oracle servers?
What is format trigger?
What are the components of logical database structure in oracle database?
Explain oracle’s system global area (sga).
How to bring a tablespace offline?
In which language oracle has been developed?
What is the fastest query method to fetch data from the table?
How to run create database statement?
what is dynamic SGA and static SGA
What is meant by joins?
How many categories of data types?
