In this article, we will learn how to use the NULL Functions in SQL.
The following are the commonly used SQL NULL Functions.
In this article, we will learn how to use the Aggregate Functions in SQL.
An Aggregate Function allows us to perform a calculation on a set of values to return a single scalar value. We often use aggregate functions with the GROUP BY and HAVING clauses of the SELECT statement.
In this article, we will learn how to get the second highest salary in SQL.
In this article, we will learn how to use the String Functions in SQL.
SQL Server has many built-in String Functions.
In this article, we will learn how to create a View using SQL query.
The CREATE VIEW statement is used to create a new view in a database.
In this article, we will learn how to create an auto-increment field/column using a query in SQL.
The IDENTITY keyword is used to perform an auto-increment feature in MS SQL Server.
In this article, we will learn how to create and delete Indexes in SQL.
To create indexes in tables, the CREATE INDEX statement is used.
In this article, we will learn how to add a column with default value using the DEFAULT constraint in SQL.
To provide a default value for a column, the DEFAULT constraint is used.
In this article, we will learn how to use the CHECK constraint in SQL.
To limit the value range that can be placed in a column, the CHECK constraint is used.
In this article, we will learn how to use the Foreign Key constraint in SQL.
A FOREIGN KEY is a key, used to link tables together.
