Data Management Foundations – 50+ Solved Exam Questions | SQL, ER Diagrams, Normalization & Constraints | 2025/2026

This Data Management – Foundations (PBLN) study guide provides 50+ exam questions with 100% verified answers, developed specifically for the 2025/2026 academic year. The content focuses on foundational principles in database management systems (DBMS) including SQL syntax and logic, relational modeling, data integrity, normalization forms, and entity-relationship diagrams. Key learning areas include: SQL operations: INSERT, UPDATE, TRUNCATE, CREATE, and constraint-based commands (e.g., CHECK, AUTO-INCREMENT) Joins and queries: Inner joins, aggregation functions (e.g., MIN), use of operators like IN and OR Database integrity & constraints: Primary keys, foreign keys, candidate keys, one-to-many and many-to-many relationships Normalization & denormalization: Boyce-Codd normal form, merging tables, optimizing for performance Entity-Relationship (ER) diagrams: Symbol meanings (square, circle), attributes, relationships (e.g., IsA) Metadata, tuples, and indexing techniques including hash indexes and relational table structure This guide is ideal for: Undergraduate students in Information Systems, Computer Science, or Data Analytics programs Learners preparing for assessments at U.S. universities and online programs (e.g., WGU) Professionals and IT trainees looking to build or reinforce foundational knowledge in databases Tutors, instructors, and bootcamp mentors seeking structured, exam-focused content Whether preparing for certification, assignments, or real-world applications, this guide supports confident mastery of core data management concepts. Keywords: data management, relational databases, SQL syntax, entity-relationship diagram, metadata, primary key, foreign key, candidate key, normalization, Boyce-Codd normal form, denormalization, auto-increment, constraints, one-to-many, many-to-many, INSERT, UPDATE, TRUNCATE, CREATE, CHECK, tuple, hash index, junction table