Q: What is MySQL?
MySQL is one of the famous open-source Database Management Systems. MySQL is easy to use, reliable, and fast. A Database management system that works on embedded systems as well as client-server systems.
Q: What do you mean by Lamp?
The Lamp is a platform that is used for web development. It uses Linux, Apache, MySQL, and PHP as an operating system, web server, database & object-oriented scripting language and hence abbreviated as LAMP.
Q: What is the procedure to install MySQL?
Installing MySQL on your system permits you to safely create, drop, and test web applications without affecting our live website's data. There are several methods to use MySQL on the system, but the best procedure is to install it manually. The manual installation allows to learn more about the system and gives more control over the database. To see the installation steps of MySQL in Windows goes to the link given below:
https://www.javatpoint.com/how-to-install-mysql
Manual installation of MySQL has many benefits:
- Backing up, reinstalling, or moving databases from one place to another can be achieved in a second.
- It gives more control over how and when the MySQL server starts and closes.
- We can install MySQL anywhere, like on a portable USB drive.
Q: Why is MySQL used?
MySQL database server is reliable, fast, and very easy to use. This software can be downloaded as freeware and can be downloaded from the internet.
Q: How to create a database in MySQL?
You can use the following given command to create a new database called ‘books’:
CREATE DATABASE books;
Q: What is DCL
DCL is a short form for Data Control Language which includes commands which are concerned with User rights, permissions, and other controls within the database system.
Here’s a list of queries for DCL:
- GRANT
- REVOKE
Q: What is BLOB in MySQL?
BLOB is an acronym that stands for a binary large object which is used to hold a variable amount of data.
There are 4 types of BLOB:
- TINY BLOB
- BLOB
- MEDIUMBLOB
- LONG BOB
A BLOB is used to hold a very large amount of data. Let’s take an example - documents, images, and even videos. You could store your complete novel as a file in a BLOB if needed.
Q: Write a query for a column addition in MySQL
For this, an ALTER TABLE query is needed. Once invoked, simply mention the column and its definition. Have a look at this:
ALTER TABLE cars
ADD COLUMN engine VARCHAR(80) AFTER color;
Q: How To Delete A Table In Mysql?
We can easily delete a table in MySQL using the Drop Table statement. This statement deletes the complete data of a table, including structure and definition from the database permanently. Therefore, it needs to be cautious while deleting a table. After using the statement, we cannot recover the table in MySQL. The statement is as follows:
DROP TABLE table_name;
Q: What Is The Default Port For Mysql And How Can It Change?
The default port is 3306. We can change it in /etc/MySQL/my.cnf there is a port variable. We can update this port according to our requirements.
Q: What Are Heap Tables?
HEAP tables are present in memory and are used for high-speed storage on a temporary basis.
• BLOB or TEXT fields are not allowed • Only comparison operators can be used =, <,>, = >,=< • AUTO_INCREMENT is not supported by HEAP tables • Indexes should be NOT NULL