How to Format Dates as 'Month-Year' When Grouping Data in SQL?

SQL Grouping by Month and Year: Enhanced Date Formatting

In this SQL query, you aim to modify the 'date' column to display the month and year in the "month-year" format, such as "9-2011." To achieve this, you can employ the following techniques:

Using CAST and CONCATENATION

The CAST function can convert your date components into VARCHAR strings. By concatenating the formatted month and year using the ' ' operator, you can obtain the desired format. Here's an example:

SELECT CAST(MONTH(date) AS VARCHAR(2)) + '-' + CAST(YEAR(date) AS VARCHAR(4)) AS Mjesec, SUM(marketingExpense) AS SumaMarketing, SUM(revenue) AS SumaZarada 
FROM [Order]
WHERE (idCustomer = 1) AND (date BETWEEN '2001-11-3' AND '2011-11-3')
GROUP BY CAST(MONTH(date) AS VARCHAR(2)) + '-' + CAST(YEAR(date) AS VARCHAR(4))

Using CAST with Leading Zeroes

If you prefer leading zeroes in your month formatting, you can use the following approach:

GROUP BY 
  CAST(YEAR(date) AS VARCHAR(4)) + '-' + right('00' + CAST(MONTH(date) AS VARCHAR(2)), 2) 

This method ensures that single-digit months are padded with a leading zero.

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