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…
In this article, we will learn how to use the ALTER TABLE statement in SQL. To add or delete or…