What is the difference between the primary and unique key in Mysql?
| Primary Key | Unique Key |
|---|---|
| A table can hold only one primary key | It can be more than one unique key in one table |
| A Primary Key cannot be NULL. | A Unique key can have NULL. |
| Primary Key | Unique Key |
|---|---|
| A table can hold only one primary key | It can be more than one unique key in one table |
| A Primary Key cannot be NULL. | A Unique key can have NULL. |