Introduction to MYSQL Database Management System (DBMS) is used to store, retrieve, and modify the data. A good database engine serves as connector between you and your data, organizing and cataloging the data for quick and easy retrieval. Database Architectures Before you work with database, you need decide on which database you want to experiment. …
A relational database is a database system that allows data to be associated and grouped by common attributes. Basically, a relational database arranges data into tables, where each table is divided into rows and columns of data. In database, each row in a table represents a data record and each column represents a field. The …
Here, you will learn how to create a new database in MySql, add a table to the database, and add data to the table. You will also learn how to query databases and tables, update data in tables, and delete data, tables, and databases. Creating a New Database It is easy to create a new …
Creating a table in MYSQL database As you know, tables are used to store data. Here, we will create a very simple table Courses containing three fields :Course id (the primary key),Course name (the name of the Course), and Duration (Duration of the Course). First, you need to select the database you just created. Once …
Adding Data to a Table To insert the data in a Table related to the courses use the SQL INSERT statement. INSERT INTO table VALUES (value1, value2, …); This inserts values into each of the fields of the table, in the order that the fields were created. Alternatively, you can create a row with only …
Reading Data from a Table To read data in SQL, you create a query using the SELECT statement. To retrieve a list of all the data in the Course table, use: mysql > SELECT * from Course; Output Course id Course name Duration 1 C 3 2 ASP.NET 6 3 MySql 8 3 rows in …
Updating Data in a Table You can also change the existing data in a table with the UPDATE statement. As with the SELECT statement, you can add a WHERE clause to specify exactly which rows you want to update. If you leave out the WHERE clause, the entire table gets updated. Here is an example …
Deleting Data from a Table To delete rows, you use the DELETE statement. If you add a WHERE clause, you can choose which row or rows to delete; otherwise all the data in the table are deleted. mysql > DELETE FROM Course WHERE Course id = 1; Query OK, 1 row affected mysql > SELECT …
Reading data In MYSQL Here , we will study how to read data from the database. To read the data from the database use the SELECT statement. To send SQL statements to the MySQL server, a user need to use the query method of the PDO object: $conn- > query ( $sql ); If the …
Deleting Tables and Databases To delete a table entirely, use the DROP TABLE statement. Similarly, you can delete an entire database with DROP DATABASE . Here, we will show you how to DROP TABLE mysql > SHOW TABLES; Output Tables_in_mydatabase Courses 1 row in set mysql > DROP TABLE Course; Query OK, 0 rows affected …