SQL Server Date Range Comparisons: BETWEEN vs. =?

Comparing Date Ranges in SQL Server: BETWEEN vs =

In SQL Server versions 2000 and 2005, the BETWEEN keyword provides a concise alternative to using the = operators for comparing date ranges. However, understanding the nuances of these syntaxes is crucial for effective data selection.

Difference Between BETWEEN and =

BETWEEN is a shortcut that is equivalent to the following longer syntax:

EventDate >= '10/15/2009' AND EventDate <p>Both syntaxes return the same result: all rows where the EventDate column falls within the specified range.</p><p></p><h3 id="When-to-Use-Each-Syntax">When to Use Each Syntax</h3><p>Use the BETWEEN keyword when you want to specify an inclusive range, where both endpoints are included. This is the most common scenario.</p><p>Use the longer syntax when you need to exclude one or both endpoints. For example:</p><pre class="brush:php;toolbar:false">EventDate >= '10/15/2009' AND EventDate <p>This query excludes rows where the EventDate is equal to '10/19/2009'.</p><p></p><h3 id="Dealing-with-DATETIME-Data-Type">Dealing with DATETIME Data Type</h3><p>When comparing DATETIME values, it's important to consider the time component as well. By default, BETWEEN and = compare only the date portion.</p><p>To include the time portion in the comparison, specify the full value, including the time down to the second:</p><pre class="brush:php;toolbar:false">EventDate BETWEEN '2009-10-15 00:00' AND '2009-10-18 23:59:59'

This query will correctly include all rows for the given date range, including the time component.

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