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POGet a list of dates between two dates using a function
 

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    <p>My question is similar to <a href="https://stackoverflow.com/questions/510012/get-a-list-of-dates-between-two-dates">this</a> MySQL question, but intended for SQL Server:</p> <p>Is there a function or a query that will return a list of days between two dates? For example, lets say there is a function called ExplodeDates:</p> <pre><code>SELECT ExplodeDates('2010-01-01', '2010-01-13'); </code></pre> <p>This would return a single column table with the values:</p> <pre class="lang-none prettyprint-override"><code>2010-01-01 2010-01-02 2010-01-03 2010-01-04 2010-01-05 2010-01-06 2010-01-07 2010-01-08 2010-01-09 2010-01-10 2010-01-11 2010-01-12 2010-01-13 </code></pre> <p>I'm thinking that a calendar/numbers table might be able to help me here.</p> <hr> <p><strong>Update</strong></p> <p>I decided to have a look at the three code answers provided, and the results of the execution - as a % of the total batch - are:</p> <ul> <li><a href="https://stackoverflow.com/a/1378788/1378788">Rob Farley's answer</a> : 18%</li> <li><a href="https://stackoverflow.com/a/1378866/1378866">StingyJack's answer</a> : 41%</li> <li><a href="https://stackoverflow.com/a/1378712/1378712">KM's answer</a> : 41%</li> </ul> <p><em>Lower is better</em></p> <p>I have accepted Rob Farley's answer, as it was the fastest, even though numbers table solutions (used by both KM and StingyJack in their answers) are something of a favourite of mine. Rob Farley's was two-thirds faster.</p> <p><strong>Update 2</strong></p> <p>Alivia's <a href="https://stackoverflow.com/a/9207952/31532">answer</a> is much more succinct. I have changed the accepted answer.</p>
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    1. USDan Atkinson
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    1. COLooping performance in SQL is going to S U C K. Please keep that in mind when trying out these answers.
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    2. COWhat about exec time? % of total batch is used to identify a bottleneck, not throughput. Are you benchmarking the actual function call or everything else with it? Comparing the results of small and large batches?
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    3. COusing SET STATISTICS TIME ON all three functoions called with ('1/1/1998','12/31/2020') report back the same CPU time = 0 ms, elapsed time = 1 ms. When calling Rob's and mine with ('1/1/1900','1921-11-27'), StingyJacks can't do that date range I get Rob's as: CPU time = 93 ms, elapsed time = 93 ms. and I get mine: CPU time = 0 ms, elapsed time = 1 ms., mine looks way better. What testing method do you use @Dan Atkinson? if you included the one time Number table set-up, that is a VERY FLAWED way, as it does not reflect the actual in-use perfomrance.
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