Database Tables and Queries

≈ 32 min

Database Tables and Queries

A relational table stores rows with consistent columns. A primary key uniquely identifies a row, while queries select, filter, sort and aggregate needed data.

Core checkpoint: Collect only fields needed for the stated purpose.

Which statement best captures the core checkpoint for Database Tables and Queries?

Collect only fields needed for the stated purpose.

Choose a solution before defining the evidence.

Ignore units, limits and boundary cases.

Assume the first result applies in every context.

Enter the highlighted key term for Database Tables and Queries. Checkpoint clue: What is the purpose of a primary key?

Which lesson most directly explains the concepts used in this application?

A school library can use a book identifier without exposing learner data in the catalogue.

Database Tables and Queries

Values, Variables and Types

Strings and Input/Output

none of these concepts