MySQL − Constraints Table of content MySQL Constraints The MySQL constraints can be used to set certain rules to the column(s) in a table. These constraints can restrict the type of data that can be inserted or updated in a particular column. This helps you to maintain the data accuracy and reliability in a table. […]

MySQL − Queries Table of content MySQL is an open-source relational management system (RDBMS) that allows us to store and manage data or information. The queries in MySQL are commands that are used to retrieve or manipulate the data from a database table. Following are the commonly used commands in MySQL: SELECT, UPDATE, DELETE, INSERT […]

MySQL – Derived Tables Table of content MySQL Derived Tables The Derived tables are pretty much what their name describes: they are the tables that are derived from another MySQL database table (main table). In other words, the derived table is a virtual result-set obtained from a SELECT statement given as a subquery to another […]