WGU D427 Data Management – Applications, D427, Western Governors University (WGU), 2026–2027, Complete OA Preparation Study Guide with SQL Practice Questions and Answers

WGU D427 Data Management – Applications, D427, Western Governors University (WGU), 2026–2027, Complete OA Preparation Study Guide with SQL Practice Questions and Answers Introduction This document covers key topics for the WGU D427 Data Management – Applications course, including SQL queries, joins, aggregate functions, DDL and DML commands, primary and foreign keys, views, indexes, referential integrity constraints, and entity-relationship modeling. It includes practice questions with precise answers designed for Objective Assessment (OA) preparation. The material provides comprehensive SQL statement examples for SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, and JOIN operations commonly tested in the course. Exam Questions and Answers 30.22. Which query illustrates performing an outer join of the Movie table with a different table? -SELECT M.Title, A.Name FROM Movie M, Actor A WHERE M.ActorID = A.ActorID; -SELECT M.Title, A.Name FROM Movie M, Actor A WHERE M.ActorID = A.MovieID; -SELECT M.Title, A.Name FROM Movie M RIGHT JOIN Actor A ON M.ActorID = A.ActorID; -SELECT M.Title, A.Actor FROM Movie M INNER JOIN Actor A ON M.ActorID = A.ActorID--- correct precise answer --- SELECT M.Title, A.Name FROM Movie M RIGHT JOIN Actor A ON M.ActorID = A.ActorID; 31.23. Assume there are two tables, A and B. Which rows will always be included in the result set if Table A is inner joined with Table B? a.Only rows in Tables A and B that share the join condition b.All rows in Table B c.All rows in Table A d.Only rows in Tables A and B that do not share the join condition.--- correct precise answer --- Only rows in Tables A and B that share the join condition 32.24. The database contains a table named Book. Write a SQL query to return all data from the Book table without directly referencing any column names.--- correct precise answer --- SELECT * FROM Book;