SSC CGL Exam > SSC CGL Videos > SSC CGL Tier 2 - Study Material, Online Tests, Previous Year > Relational Database and Schemas
Relational Database and Schemas Video Lecture | SSC CGL Tier 2 - Study Material, Online Tests, Previous Year
FAQs on Relational Database and Schemas Video Lecture - SSC CGL Tier 2 - Study Material, Online Tests, Previous Year
| 1. What is a relational database? |  |
Ans. A relational database is a type of database that stores and organizes data using tables with rows and columns. It is based on the relational model, which allows the data to be structured and linked together through relationships.
| 2. What is a schema in a relational database? | |
Ans. A schema in a relational database is a logical structure that defines the organization, layout, and relationships of the database. It defines the tables, columns, data types, constraints, and relationships between the tables.
| 3. How does a relational database ensure data integrity? | |
Ans. A relational database ensures data integrity through various mechanisms such as primary keys, foreign keys, constraints, and transactions. Primary keys uniquely identify each record in a table, foreign keys establish relationships between tables, constraints enforce rules on data, and transactions ensure that multiple database operations are executed as a single unit to maintain consistency.
| 4. What are the advantages of using a relational database? | |
Ans. Some advantages of using a relational database include:
- Data organization: It provides a structured way to organize and store data, making it easier to retrieve and analyze.
- Data integrity: It enforces rules and constraints to maintain data accuracy and consistency.
- Scalability: It allows for the addition of new tables and relationships without disrupting the existing data.
- Querying and reporting: It supports powerful SQL queries and enables efficient reporting and analysis.
- Security: It offers built-in security features to protect data from unauthorized access.
| 5. Can a relational database handle complex relationships between tables? | |
Ans. Yes, a relational database can handle complex relationships between tables. It uses primary keys and foreign keys to establish relationships between tables, allowing for one-to-one, one-to-many, and many-to-many relationships. These relationships can be defined and maintained through the database schema, ensuring the integrity and consistency of the data.
Text Transcript from Video
let's understand the term schema in
databases in dictionary schema means a
plan structured framework a diagram or
an outline database schema will mean
database plan a database structure
database outline order database diagram
it is a description of the entire
database database schema is specified
when we design a database and we expect
that it will not change frequently
displayed schema is called a schema
diagram let's take an example a company
schema diagram it shows a company plan
the company structure company outline or
a company diagram here it shows all the
tables in this company database even all
the columns of a table are specified the
term relation schema means description
of a relation or a table and the syntax
to specify this relation schema is table
name or relation name in bracket all the
columns separated by comma in problems
you may see this term schema where you
will be asked to write
database schema or you will be given a
relation schema and you will be asked to
write queries on it thank you
databases in dictionary schema means a
plan structured framework a diagram or
an outline database schema will mean
database plan a database structure
database outline order database diagram
it is a description of the entire
database database schema is specified
when we design a database and we expect
that it will not change frequently
displayed schema is called a schema
diagram let's take an example a company
schema diagram it shows a company plan
the company structure company outline or
a company diagram here it shows all the
tables in this company database even all
the columns of a table are specified the
term relation schema means description
of a relation or a table and the syntax
to specify this relation schema is table
name or relation name in bracket all the
columns separated by comma in problems
you may see this term schema where you
will be asked to write
database schema or you will be given a
relation schema and you will be asked to
write queries on it thank you
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May 19, 2025
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