SQL Server Identity
Identity column of a table is a column whose value increases automatically. The value in an identity column is created by the server. A user generally cannot insert a value into an identity column. Identity column can be used to uniquely identify the rows in the table.
IDENTITY [( seed, increment)] Seed: Starting value of a column. Default value is 1. Increment: Incremental value that is added to the identity value of the previous row that was loaded. The default value 1.
The ‘ID’ column of the table starts from 1 as the seed value provided is 1 and is incremented by 1 at each row.
The ‘ID’ column of the table starts from 1 but is incremented by 2 as the increment value is passed as 2 while creating the ‘IDENTITY’ Column.