DBMS app includes below topics with detail explanations :

DBMS Tutorial : Overview, Data Models, Data Schemas, Data Independence

Entity Relationship model : Basic Concepts, Representation, Generalization, Aggregation

Relational Model : Codd's Rules, Relational Data Model, Relational Algebra, ER To Relational Model, SQL Overview

Relational Database Design : Database Normalization, Database joins

Storage and File Structure : Storage System, File Structure

Indexing and Hashing : Indexing, Hashing

Transaction and concurrency : Transaction, Concurrency Control, Deadlock

Backup And Recovery : Data Backup, Data Recovery
DBMS Full Course - DataBase Management System
Learn Database Management System
Learn Database
Database learning
Data model etc.