SQL(Structured Query Language) is a standard database programming language for accessing and manipulating data in a relational database. It is a powerful language widely used in industry; To become proficient, it is necessary to become familiar with and practice it. This SQL tutorial series will help you learn SQL from the basics.
What Will You Gain by Learning SQL?
SQL gives unique learning and database handling techniques on Structured Query language and will help you make better command over the SQL queries and to deal with these codes efficiently. Since SQL allows you to include database creation, database or table deletion, fetching row data and modifying those data, etc., in parallel, SQL makes things automatic and smooth for end-users to access and deal with that application's data efficiently.
Before learning SQL, it is helpful to have a basic understanding of databases and how they are structured. It will be beneficial to understand concepts such as tables, rows, and columns and the difference between a primary key and a foreign key. Additionally, some basic knowledge of programming concepts, such as loops and conditionals, can be helpful when working with SQL.
The SQL query to select all records from the users' table:
SELECT * FROM users;
The SQL query to delete single records from the
users table by using the
DELETE FROM users WHERE user_id=299;