Frequently Asked Questions About SQL
1. What are the types of SQL?
There are 5 types of SQL of commands DDL (Data Definition Language), DML (Data Manipulation Language), DCL, (Data Control Language), TCL (Transaction Control Language), DQL (Data Query Language)
2. How do I start learning SQL?
Well, if you want to start learning SQL, then first you have to set your goals, and after that, you have to find the resource from which you can easily learn SQL. After that, you have to do the regular practice to upscale your skills.
3. What are the basic commands of SQL?
The basic commands of SQL are UPDATE, SELECT, INSERT, and DELETE.
4. What are data types in SQL?
SQL has String Data Type, Numeric Data Type, Date and time Data Type.
SQL Tutorial
In this SQL tutorial, you’ll learn all the basic to advanced SQL concepts like SQL queries, SQL join, SQL injection, SQL insert, and creating tables in SQL. SQL is easy to learn, there are no prerequisites to learning SQL.
So, SQL is a standard database language used to access and manipulate data in databases. SQL stands for Structured Query Language. It was developed by IBM Computer Scientists in the 1970s. By executing queries SQL can create, update, delete, and retrieve data in databases like MySQL, Oracle, PostgreSQL, etc. Overall, SQL is a query language that communicates with databases.
What is a Database?
Before deep diving into this free SQL tutorial, let’s understand what a database is.
So, data is the new fuel of this world, but data is unorganized information, so to organize that data, we make a database. A database is an organized collection of structured data, usually controlled by a database management system (DBMS). Databases help us easily store, access, and manipulate data held on a computer.