CommitId is an identity field in the Commit table, designed to uniquely identify each individual commit. It is of data type integer, meaning it can hold whole numbers from -2,147,483,648 to 2,147,483,647. This field is automatically generated and assigned to a commit when it is created, ensuring that each commit has a distinct identifier. The CommitId is an essential component of the Commit table, allowing for efficient retrieval and tracking of specific commits within the database.