What is differance unique key and primary key.
Answer Posted / dhanashree
Unique Key can be NULL
But
Primary Key can not be NULL
| Is This Answer Correct ? | 6 Yes | 1 No |
Post New Answer View All Answers
Explain what is a database?
What are secondary keys?
Define tables and fields in a database
how to show all tables with 'mysql'? : Sql dba
What are the types of variables use in pl sql?
What is the file extension for sql database?
What does data normalization mean?
How do I create a sql database?
Explain what is table in a database?
What is rtm stands for?
How much does sql certification cost?
What are tuples in sql?
How would you reference column values before and after you have inserted and deleted triggers?
explain the difference between myisam static and myisam dynamic. : Sql dba
what is msql? : Sql dba