Every table in a database must contain one field that is designated as the ID key field

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Not every table requires an ID key field; however, it is common practice to include a unique identifier (often called a primary key) to efficiently manage and reference each record uniquely. Some tables, especially those used for linking others in many-to-many relationships, might not designate a specific "ID" field as their primary key but will use a combination of fields instead.

Every Table in a Database Must Contain One Field That