What is the difference between primary and unique key
Answer Posted / sudhanshu_kmr
.....primary key.......... unique key
at most one column .....:... any number of column
only unique values........... only unique values
don't accept null........... accept null
Is This Answer Correct ? | 3 Yes | 2 No |
Post New Answer View All Answers
What is the use of mysql_close()?
How do I assign a variable in mysql?
How to make a column bigger and delete unique from table.
Can you tell the difference between $message and $$message?
What is a deterministic function?
What is key in mysql?
Can you tell the difference between ereg_replace() and eregi_replace()?
How do I rename a mysql database?
What is a procedure example?
What is the maximum no of columns a table can have?
How do I download a mysql community server?
How do I start mysql server?
What are the advantages of mysql in comparison to oracle?
What is InnoDB?
What does mysql_query return?