Auto-increment allows a unique number to be generated automatically when a new record is inserted into a table. Often this is the primary key field that we would like to be created automatically every time a new record is inserted.
How do auto incremented keys work?
Summary
- Auto increment attribute when specified on a column with a numeric data types, generates numbers sequentially whenever a new row is added into the database.
- The Auto increment is commonly used to generate primary keys.
What is an auto incremented key in relational database?
The auto-increment key allows a unique number to be generated when a new record is inserted into a table. So every time we want to create a new record the database engine creates primary key automatically, and its responsibility is that this key is unique to the table.
