How to Convert SQL Server Datetime Format from yyyy-mm-dd to dd-mm-yyyy?

Summary: Learn how to convert SQL Server datetime format from yyyy-mm-dd to dd-mm-yyyy with simple and advanced techniques for effective date formatting.
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How to Convert SQL Server Datetime Format from yyyy-mm-dd to dd-mm-yyyy?

When working with SQL Server, handling date formats effectively can often pose challenges, especially when you need to present dates in a format that is different from the default. One common requirement is to convert the date format from yyyy-mm-dd to dd-mm-yyyy. Let's explore how you can accomplish this task using a variety of methods in SQL Server.

Understanding the Datetime Data Type

Before diving into conversions, it's essential to understand how SQL Server handles datetimes. The datetime data type includes both date and time information in the yyyy-mm-dd hh:mm:ss format by default. However, for display or reporting purposes, you may need to format the date differently.

Basic Conversion Using the CONVERT Function

SQL Server provides a CONVERT function that allows you to change the format of your datetime data. Here’s a straightforward way to convert yyyy-mm-dd to dd-mm-yyyy:

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In the above example:

GETDATE() gets the current date and time.

CONVERT(VARCHAR, GETDATE(), 105) converts the datetime to a string in dd-mm-yyyy format. The third parameter 105 is a style code that signifies the desired date format.

Using FORMAT Function for More Flexibility

The FORMAT function can be more flexible and easier to remember compared to the CONVERT function. Here’s how you can use it:

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The FORMAT function takes the date and formats it according to the string pattern you provide. In this case, 'dd-MM-yyyy' achieves the desired format.

Storing Formatted Date

If you need to store the formatted date in your database, make sure to choose an appropriate data type, typically VARCHAR, to hold the string format of the date. Here’s an example of inserting a formatted date into a table:

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Advanced Scenario: Custom Date Formatting

For more complex date formatting needs, you might find yourself combining multiple functions. For example:

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This query manually concatenates day, month, and year components. It ensures that both days and months are always two digits long, even if they are single digit numbers.

Conclusion

Converting SQL Server datetime formats can range from using simple built-in functions to employing more advanced techniques for custom formatting. Whether you use CONVERT or FORMAT, having a good grasp of these functions allows you to effectively present and manage datetime data according to your needs.

Experiment with these methods and see which one fits best for your specific scenario. Happy querying!