In SQL Server, the comparison operators are wont to test for equality and inequality. These operators are utilized in the WHERE clause to work out which records to pick.

Following may be a list of the SQL Server comparison operators:

Index	Comparison Operator	Description
1)	=	It specifies equal symbol.
2)	<>	It specifies not equal symbol.
3)	!=	It specifies not equal symbol.
4)	>	It specifies greater than symbol.
5)	>=	It specifies greater than or equal symbol.
6)	<	It specifies less than symbol.
7)	<=	It specifies less than or equal symbol.
8)	!>	It specifies not greater than symbol.
9)	!<	It specifies not less than symbol.
10)	IN ( )	It matches a value in a list.
11)	NOT	It is used to negate a condition.
12)	BETWEEN	It is used to specify within a range (inclusive) value.
13)	IS NULL	It specifies null value.
14)	IS NOT NULL	It specifies non-null value.
15)	LIKE	It specifies pattern matching with % and _
16)	EXISTS	It specifies that the condition is met if subquery returns at least one row.

Equality Operator

In SQL Server database, Equality Operator “=” is employed to check for equality during a query.

Example:

We have a table named “Employees”, having the subsequent data:

Use the subsequent query to pick the precise data where “name” = “Lily”:

SELECT *
FROM [tecklearn].[dbo].[Employees]
WHERE name = 'Lily';

Output:

Inequality Operator

In SQL Server, inequality operators ” or !=” are wont to test for inequality during a query.

SELECT *
FROM [tecklearn].[dbo].[Employees]
WHERE name 'Lily';

Output:

SELECT *
FROM [tecklearn].[dbo].[Employees]
WHERE name != 'Lily';

Output:

Greater Than Operator

Greater Than “>” Operator is employed to check for an expression that it’s “greater than”.

Example:

Let’s select employees from the table “Employees” where salary > 15000.

SELECT *
FROM [tecklearn].[dbo].[Employees]
WHERE salary > 15000;

Output:

Greater Than or Equal Operator

Greater Than or Equal “>=” Operator is employed to check for an expression that it’s “greater than or equal to”.

SELECT *
FROM [tecklearn].[dbo].[Employees]
WHERE salary >= 15000;

Output:

Page 7 Image 6 1 — greater than equal to

Less than Operator

Less Than “<” Operator is employed to check for an expression that it’s “less than” the opposite one.

Example:

Select all employees from the table “Employees” where salary is < 20000.

SELECT *
FROM [tecklearn].[dbo].[Employees]
WHERE salary < 20000;

Output:

Less Than or Equal Operator

Less Than or Equal “<=” “<=” Operator is used to test for an expression that it is “less than or equal to” the other one.

SELECT *
FROM [tecklearn].[dbo].[Employees]
WHERE salary <= 20000;

Output:

So, this brings us to the end of blog. This Tecklearn ‘SQL Server Comparison Operator’ blog helps you with commonly asked questions if you are looking out for a job in MS-SQL Server. If you wish to learn MS-SQL Server and build a career in Database domain, then check out our interactive, MS-SQL Server Training, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

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Working with SQL: Join, Tables, and Variables

SQL Operators and Queries
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What is Rank Function? Triggers, when to execute Triggers?

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