
Mastering ER Diagrams and SQL
Authored by Shabnam Choudhary
Computers
12th Grade
Used 3+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does ER stand for in ER diagrams?
Entity-Record
Entity-Relation
Entity-Reference
Entity-Relationship
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of an ER diagram?
To represent the relationships between entities in a database.
To optimize the performance of queries.
To create a backup of the database.
To display the data in a tabular format.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define DDL and give an example of a DDL command.
SELECT * FROM
CREATE TABLE
ALTER VIEW
DROP DATABASE
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between DDL and DML?
DDL is used for querying data; DML defines database structure.
DDL defines database structure; DML manipulates data within that structure.
DDL is a programming language; DML is a markup language.
DDL and DML are the same and can be used interchangeably.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
List three common DML commands.
WHERE
INSERT, UPDATE, DELETE
JOIN
SELECT
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a data model?
A data model is a programming language.
A data model is a type of software application.
A data model is a framework that defines how data is structured and related.
A data model is a method for data encryption.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Name two types of data models.
Flat file data model
Hierarchical data model
Network data model
Relational data model, Document data model
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