How to use ALTER TABLE with AUTOINCREMENT In SQL
In this approach, we’ll utilize the ALTER TABLE statement along with the AUTOINCREMENT keyword to add an identity column to an existing table.
Syntax:
ALTER TABLE table_name
ADD COLUMN column_name INTEGER PRIMARY KEY AUTOINCREMENT;
Example: Adding an Identity Column to the “Products” Table in SQLite
ALTER TABLE products
ADD COLUMN row_id INTEGER PRIMARY KEY AUTOINCREMENT;
Output:
Explanation:
- The row_id column is added to the products table with auto-incrementing values.
- The AUTOINCREMENT keyword ensures that each new row inserted into the table will have a unique, auto-incremented value for the row_id column.
How to Add an Identity to an Existing Column in SQLite
An identity column as a column added to an existing table in SQLite would probably be a crucial task while database restructuring or when implementing new features. The identity column is provided with a compulsory key with auto-incremented values, which makes the administration of data easier and also enhances database efficiency.
In this article, we will understand the process of configuring the Identity Column to an already existing table in SQLite. We’ll talk about the list of steps, and advantages resulting from identity column utilization, and try to give enough instructions to help developers easily add this feature to their SQLite databases