In this article, we will learn how to create and delete Indexes in SQL. To create indexes in tables, the…
In this article, we will learn how to add a column with default value using the DEFAULT constraint in SQL. To…
In this article, we will learn how to use the CHECK constraint in SQL. To limit the value range that…
In this article, we will learn how to use the Foreign Key constraint in SQL. A FOREIGN KEY is a…
In this article, we will learn how to use the Primary Key constraint in SQL. The PRIMARY KEY constraint is…
In this article, we will learn how to use the UNIQUE constraint in SQL. The UNIQUE constraint is used to…
In this article, we will learn how to use the NOT NULL constraint in SQL. A column can hold NULL…