what is the difference between primary key & foreign key?
- 57 Answers
- 122276 Views
- CTS, Infosys, La Multi, Sparsh, Wipro, I also Faced
- E-Mail Answers
Answer Posted / leang heng
Primary Key is a column or group of columns that determine
in each Record to make not null.
Foreign Key is Column that provide Relationship to Primary
Key between Entities or Table.
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
How to load data through external tables?
What is the database name in oracle?
Why is oracle database so popular?
How to assign values to data fields in record variables?
What is the meaning of recursive hints in oracle?
Can we call procedure inside function in oracle?
How to load a large xml file?
src name sex a,male b,female c,male d,female Required output : male female a,b c,d tried pivot but was not successfull select * from src pivot (max(name) for sex in ('MALE','FEMALE'));
Explain the use of indexes option in exp command.
why should i declare foreign key constraint as self relation instead of binary relation in tables ?
what are bitmap indexes? How does they work?
What are the differences between char and nchar in oracle?
What is a sub query and what are the different types of subqueries?
Use of an integrity constraint is better to validate data. Explain
Can multiple cursors being opened at the same time?
