Introduction
MySQL is the essential tool for developers to communicate with databases. It uses Structured Query Language (SQL) to perform all the operations like retrieve, manage, and manipulate data from the database. MySQL is commonly used with PHP and Apache Web servers to create dynamic websites. Mastering SQL can open up the door for exciting opportunities. In this article, I have compiled a list of 50 basic MySQL interview questions that will help you prepare for your upcoming interview.
Top 50 Basic MySQL Interview Questions
1. What is MySQL?
MySQL is an open-source relational database management system (RDBMS) used for a wide variety of applications, including data warehousing, e-commerce, and logging applications.
2. How do we create a new database in MySQL?
To create a database, we use the following query:
CREATE DATABASE DBname; 3. What is the query to create a new table in MySQL?
The following is the SQL query that we use to create a new table:
CREATE TABLE table_name (
column1 datatype1,
column2 datatype2,
...
); 4. What are the DROP and TRUCNATE commands used for?
DROP is used to remove a table from the database, once it removes the table it cannot be rolled back. But if we use the TRUNCATE command, all the rows will get removed from the table.
Must Read: JSON vs SQL Overview
5. What are the steps to install MySQL in Windows?
The following are the steps to install the MySQL in Windows:
- First, visit the MySQL official page and download the MySQL Community Edition installer for Windows
- Once done, run the installer and choose the “Setup Type” according to your requirements follow the installation wizard, and configure the MySQL server as per your preferences.
- When the installation process is completed, set your MySQL root password along with the user’s credentials.
- After successfully setting the root, MySQL will start installing automatically.
6. What is the difference between a clustered index and a non- clustered index?
| Clustered Index | Non-Clustered Index |
|---|---|
| It is used for easy retrieval of data from the database. | It does not alter but creates a separate object within a table that again points back to the original rows. |
| Comparatively faster than the non-clustered index. | relatively slower |
| One table can only have one clustered index. | One table can have many non-clustered indexes. |
7. What is the role of a stored procedure in MySQL?
A stored procedure is useful when we need to perform a task repeatedly and complex task. It allows us to store and reuse the code, whenever necessary we can call it in the code.
8. What are the first three normal forms of normalization?5§ The author50 Basic MYSQL Interview Questions
MySQL basic interview questions and answers that a tech beginner looking to make a career in MySQL should know. Mastering MySQL can open many golden opportunities.
50 Basic MYSQL Interview Questions
MySQL basic interview questions and answers that a tech beginner looking to make a career in MySQL should know. Mastering MySQL can open many golden opportunities.
PublishedApril 19, 2024
Category50 Basic MYSQL Interview Questions
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