When working with SQL, date manipulation is a common task, especially when you need to filter data based on specific time periods. One such scenario is retrieving data for the **last 3 calendar months**. In this blog post, we’ll explore how to write SQL queries to achieve this, explain key functions like `DATEDIFF` and `DATEADD`, and provide examples for different database systems.
Retrieving Last 3 Calendar Months of Data
- To retrieve data for the last 3 calendar months, we need to filter rows based on the first day of the current month and go back three months.
- This ensures that the data aligns with full calendar months rather than just counting backward from the current date.
What DATEDIFF does?
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