What is the difference between the Primary and Foreign key?
Answer Posted / dinesh kumar
Primary key will checks for the Duplicates.
Can hold only one primary key for a single table.
Foreign key will be referred from the Primary/unique Key
constraint. Hold even null values in it.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what is meant by urlencode and urldocode? : Sql dba
What is trigger in pl sql with examples?
What is pl sql collection?
What is structural independence and why is it important?
How is data stored in sql?
Can we create foreign key without primary key?
What is trigger in flip flop?
How do I run a pl sql procedure in sql developer?
what is sp_pkeys? : Transact sql
write an sql query to find names of employee start with 'a'? : Sql dba
What is sql lookup?
How do I find duplicates in two columns?
Why having clause is used in sql?
What does data normalization mean?
Define overloaded procedure?