How to Get the First Day of the Week as Sunday in SQL Server

Learn how to retrieve the first day of the week (Sunday) for any date using SQL Server with a simple DATEADD and DATEDIFF query.

37 views

In SQL Server, to get the first day of the week (assuming Sunday) for any given date, you can use the following query: `SELECT DATEADD(wk, DATEDIFF(wk, 6, GETDATE()), 6)`. This code calculates the difference in weeks between a known Sunday (`DATEDIFF(wk, 6, GETDATE())`) and the current date (`GETDATE()`), then adds that number of weeks back to a known Sunday (`DATEADD(wk, <calculated number of weeks>, 6)`), effectively returning the first day of the current week.

FAQs & Answers

  1. How do I find the first day of the week in SQL Server? You can use a combination of DATEDIFF and DATEADD functions to calculate the first day of the week, typically using a known reference day such as Sunday or Monday.
  2. Why is Sunday considered the first day of the week in SQL Server? By default, SQL Server considers Sunday as the first day of the week depending on the DATEFIRST setting or regional settings, but it can be adjusted as needed.
  3. Can I change the first day of the week in SQL Server? Yes, you can change the first day of the week using the SET DATEFIRST command to set which day SQL Server treats as the start of the week.

Watch More

For more SQL Server date and time functions, explore tutorials on getting the last day of the week, working with different week start days, and optimizing date queries for performance.

  1. How to Find Saturdays and Sundays Using SQL - A Step-by-Step Guide Learn to select Saturdays and Sundays in SQL with the DAYOFWEEK function. Simple queries included!
  2. How to Get All Days of the Week in SQL Using CTE Learn how to retrieve all days of the week in SQL with a simple Common Table Expression (CTE) query. Step-by-step example included.
  3. What Day Number Does Sunday Represent in Excel's WEEKDAY Function? Learn how Sunday is represented in Excel's WEEKDAY function using different numbering systems for accurate date calculations.
  4. How to Find the Day of the Week for a Date in SQL Using DAYNAME Learn how to find the day of the week from a date in SQL with DAYNAME and DAYOFWEEK functions. Easy examples included.
  5. How to Check if a Date is Saturday or Sunday in SQL Using DAYOFWEEK() Learn how to use the SQL DAYOFWEEK() function to identify if a date falls on a Saturday or Sunday and classify weekends effectively.
  6. How to Extract Day Name in SQL: A Step-by-Step Guide Learn how to easily get the day name in SQL using DATENAME and DAYNAME functions. Perfect for data organization and queries!
  7. How to Calculate Monday from Sunday Date in Excel Easily Learn how to calculate the Monday of a week from a given Sunday's date in Excel using simple formulas for accurate weekly date calculations.
  8. How to Find the Date of the Next Sunday in Excel Using a Formula Learn the Excel formula to calculate the next Sunday's date automatically using TODAY() and WEEKDAY() functions.
  9. How to Get the Day of the Week from a Date in Excel (Sunday, Monday, etc.) Learn how to extract the full or abbreviated day name from a date in Excel using the TEXT function with easy formulas.
  10. How to Calculate the Number of Sundays Between Dates in Excel Learn the Excel formula to count Sundays between two dates using SUMPRODUCT and WEEKDAY functions for accurate results.
  11. How to Calculate Number of Days Between Dates in SQL Using DATEDIFF Learn how to use the SQL DATEDIFF function to calculate the number of days between two dates with a simple example.