What is the difference between primary and unique key
Answer Posted / venkat rao
Unique key takes null value but primary key doesnot take
null value
primary key have properties of both null key and unique key
constraints
| Is This Answer Correct ? | 21 Yes | 4 No |
Post New Answer View All Answers
What is the difference between char and varchar in mysql?
How to Change a users password from unix shell.
What is the difference between truncate and delete in mysql?
Is mysql still relevant?
What is difference between function and procedure in mysql?
Explain the difference between procedure and function in mysql?
Consider a scenario where you have to send an email to a client from the sql database. How do you think you can achieve this task?
What is text in mysql?
what is mysql optimization in brief?
What is mysql community server?
Why mongodb is faster than mysql?
Is mysql a free database?
What is pragma exception?
Can you tell the difference between mysql_fetch_object and mysql_fetch_array?
how to dump all databases for backup. Backup file is sql commands to recreate all db's.