Database Management System(DBMS)

PrepInsta Database Management System
Below you will find all the important topics related to DBMS that are crucial for your Placement exams, online tests and interviews along with college semester examinations.
DBMS Basics
To learn better you have to start somewhere so following are the basics of DBMS that will help you clear your concepts about what DBMS comprises of.


Architecture and Models
Construction of a database using various techniques and models and terms relating with the same have been asked frequently in semester exams as well as interview questions.
ER Model
Meaning of Entity-Relationship diagram, various forms of attributes and all the relating concepts are of great importance since this topic is scoring and easy to learn if understood well.
- ER Data Model Basics concepts. (Attributes, relationships, Entities)
- Entity-Relationship model
- Entity-Relationship Model : Advanced
- Cardinality
- Relationships
- Participation Constraint
- Weak Entity and Strong Entity
- ER diagram representation.
- Generalization Specialization and Aggregation


Relational Database Model
Relational Database model and the different types of keys that fall under this topic are easy to learn and understand. Questions from this topic are found in various exams during placement tests and interviews.
- Codd’s Rule
- RDBMS
- Relational Data Model
- Keys in the Relational Model
- Keys in DBMS
- Primary Key in DBMS | Oracle | SQL
- Foreign Key in DBMS | Oracle | SQL
- Candidate Key in DBMS | Oracle | SQL
- Super Key in DBMS | Oracle | SQL
- Alternate Key in DBMS | Oracle | SQL
- Composite Key in DBMS | Oracle | SQL
- Non-Prime Attribute
- SQL Constraints
- Default in DBMS | Oracle | SQL
- Not Null in DBMS | Oracle | SQL
- Unique in DBMS | Oracle | SQL
- Check-in DBMS | Oracle | SQL
- Key Constraints in DBMS | Oracle | SQL
- Domain constraints in DBMS | Oracle | SQL
- Mapping constraints
- ER to Relational Model Conversion
Relational Algebra
This topic is of prime importance in DBMS since it is a little tricky to grasp. These questions are often found in the semester exams and technical rounds of various companies.


Relational Calculus
To learn better you have to start somewhere so following are the basics of DBMS that will help you clear your concepts about what DBMS comprises of.
Functional Dependencies
To learn better you have to start somewhere so following are the basics of DBMS that will help you clear your concepts about what DBMS comprises of.


Normalization
To learn better you have to start somewhere so following are the basics of DBMS that will help you clear your concepts about what DBMS comprises of.
- Introduction Normalisation
- Normal Forms
- Joins in DBMS | SQL
- Dependency Preserving Decomposition
- Lossless Join Decomposition
- Lossless Join and Dependency Preserving Decomposition
Transactions and Concurrency Control :
To learn better you have to start somewhere so following are the basics of DBMS that will help you clear your concepts about what DBMS comprises of.
- Introduction(including transaction concurrency and Deadlock)
- ACID Properties in DBMS | Oracle | SQL
- Concurrency Control Protocols – Lock-Based Protocol
- Conflict Serializability
- View Serializability
- Recoverability of Schedules.


SQL
To learn better you have to start somewhere so following are the basics of DBMS that will help you clear your concepts about what DBMS comprises of.
- Predicate in DBMS | Oracle | Pl/SQL
- SQL -Operators in DBMS | Oracle | Pl/SQL
- SQL- Expressions in DBMS | Oracle | Pl/SQL
- CREATE Table in DBMS | Oracle | Pl/SQL
- DROP/TRUNCATE/RENAME table in DBMS | Oracle | Pl/SQL
- Tuple/Record/Row in DBMS | Oracle | Pl/SQL
Queries
To learn better you have to start somewhere so following are the basics of DBMS that will help you clear your concepts about what DBMS comprises of.
- SELECT in DBMS | Oracle | SQL
- INSERT in DBMS | Oracle | SQL
- WHERE in DBMS | Oracle | SQL
- AND & OR in DBMS | Oracle | SQL
- UPDATE in DBMS | Oracle | SQL
- DELETE in DBMS | Oracle | SQL
- LIKE in DBMS | Oracle | SQL
- ORDER BY in DBMS | Oracle | SQL
- GROUP BY in DBMS | Oracle | SQL
- DISTINCT in DBMS | Oracle | SQL

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