< (Less Than) (Transact-SQL)

 

THIS TOPIC APPLIES TO: yesSQL Server (starting with 2008)yesAzure SQL DatabaseyesAzure SQL Data Warehouse yesParallel Data Warehouse

Compares two expressions (a comparison operator). When you compare nonnull expressions, the result is TRUE if the left operand has a value lower than the right operand; otherwise, the result is FALSE. If either or both operands are NULL, see the topic SET ANSI_NULLS (Transact-SQL).

Topic link icon Transact-SQL Syntax Conventions

-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  
  
expression < expression  

expression
Is any valid expression. Both expressions must have implicitly convertible data types. The conversion depends on the rules of data type precedence.

Boolean

A. Using < in a simple query

The following example returns all rows in the HumanResources.Department table that have a value in DepartmentID that is less than the value 3.

-- Uses AdventureWorks  
  
SELECT DepartmentID, Name  
FROM HumanResources.Department  
WHERE DepartmentID < 3  
ORDER BY DepartmentID;  
  

Here is the result set.

DepartmentID Name  
------------ --------------------------------------------------  
1            Engineering  
2            Tool Design  
  
(2 row(s) affected)  
  

B. Using < to compare two variables

DECLARE @a int = 45, @b int = 40;  
SELECT IIF ( @a < @b, 'TRUE', 'FALSE' ) AS Result;  
  

Here is the result set.

Result  
------  
FALSE  
  
(1 row(s) affected)  
  

IIF (Transact-SQL)
Data Types (Transact-SQL)
Operators (Transact-SQL)

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