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WGU Data Management – Foundations Sample Questions:

1. Which expression can be used to create a temporary name for a table?

A) NEW
B) HAVING
C) UNION
D) ALIAS

2. Which operation finds an entry containing a search value by repeatedly splitting the index in two?

A) Index scan
B) Fan-out
C) Table scan
D) Binary search

3. What does the aggregate function do?

A) It selects rows that appear in one table but not another.
B) It lists combinations of rows in two tables.
C) It eliminates one or more columns of a table.
D) It computes values over a set of rows.

4. Which type of join is demonstrated by the following query?
sql
SELECT *
FROM Make, Model
WHERE Make.ModelID = Model.ID;

A) EQUIJOIN
B) NON-EQUIJOIN
C) SELF JOIN
D) CROSS JOIN

5. Which optional clause is used to reject inserts and updates that do not satisfy the WHERE clause of a view query?

A) BASE TABLE
B) WITH CHECK OPTION
C) MATERIALIZED VIEW
D) JOIN VIEWS

Solutions: