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Databases Querying Relational Databases Subqueries Using a Subquery to Create a Temporary Table (Part 2)

Cayo Estevao
Cayo Estevao
2,048 Points

Why location id is = 1?

Why st louis receive location id = 1, and columbia location id = 2?

1 Answer

Steven Parker
Steven Parker
215,984 Points

ID numbers often have no relationship to the other data.

Commonly, the ID number is assigned automatically by the database when the record is first created. So while it gives a convenient way of uniquely identifying records, it may have no other meaning than just the order that the record was added.