MySQL Mastery: 10 Multiple-Choice Questions to Test Your Knowledge.

Introduction

Top 10 M.C.Q:- Questions and Answers for improving and understanding MySQL Database. Learn and Understand MySQL Database like Pro.

1. Question: What does SQL stand for in the context of databases?

A. Structured Query Language

B. Simple Query Language

C. System Query Language

D. Standard Query Language

Correct Answer: A

2. Question: In MySQL, which command is used to create a new database?

A. CREATE TABLE

B. CREATE DATABASE

C. CREATE SCHEMA

D. CREATE RECORD

Correct Answer: B

3. Question: Which SQL statement is used to retrieve data from a MySQL database?

A. SELECT

B. RETRIEVE

C. EXTRACT

D. FETCH

Correct Answer: A

4. Question: What is the primary key in a MySQL table?

A. A key that opens the table

B. A key used for sorting data

C. A unique identifier for each row

D. A key used for encryption

Correct Answer: C

5. Question: In MySQL, how do you update existing data in a table?

A. UPDATE DATA

B. ALTER TABLE

C. UPDATE TABLE

D. UPDATE

Correct Answer: D

6. Question: What is the purpose of the "WHERE" clause in an SQL statement?

A. To specify which tables to join

B. To filter rows based on a condition

C. To order the results in ascending order

D. To group rows by a specific column

Correct Answer: B

7. Question: What does the SQL command "INSERT INTO" do?

A. Deletes rows from a table

B. Inserts new rows into a table

C. Updates existing rows in a table

D. Creates a new table

Correct Answer: B

8. Question: Which SQL command is used to delete data from a MySQL table?

A. DELETE DATA

B. DELETE TABLE

C. REMOVE DATA

D. DELETE

Correct Answer: D

9. Question: In SQL, what does the "JOIN" operation do?

A. Combines rows from two or more tables based on a related column

B. Orders rows in a table

C. Deletes rows from a table

D. Adds a new column to a table

Correct Answer: A

10. Question: What is the purpose of an SQL index in MySQL?

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**A. To sort data in a table** 
 **B. To define the primary key of a table** 
 **C. To improve the performance of queries by speeding up data retrieval**
 **D. To create a backup of a database** 
 **Correct Answer: C**