How to Count the Number of Tuesdays Between Two Dates in TSQL?

How to Determine the Number of a Specific Weekday Between Two Dates Using TSQL

Calculating the frequency of a particular weekday between two dates is a valuable skill in data analysis. For instance, knowing the number of Tuesdays between two dates can aid in scheduling and planning tasks. In TSQL, there are straightforward techniques to accomplish this.

To determine the number of Tuesdays between dates, one approach involves subtracting the number of days preceding the first Tuesday of the period from that of the last Tuesday. This can be expressed as:

<code class="tsql">datediff(day, -6, @to)/7-datediff(day, -5, @from)/7</code>

Here, @from and @to represent the start and end dates respectively. The -6 and -5 values specify that we are considering Mondays (-6) and Tuesdays (-5) in our calculation.

By applying this approach to your specific data, you can easily determine the number of Tuesdays between the two dates, enabling informed decision-making.

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