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How to Get the Number of Days in a Month Using Oracle SQL

Learn how to find the number of days in any month with an Oracle SQL query using LAST_DAY and EXTRACT functions.

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Video transcript

To get the number of days in a month in Oracle SQL, use the following query: `SELECT EXTRACT(DAY FROM LAST_DAY(TO_DATE('MM-YYYY', 'MM-YYYY'))) AS days_in_month FROM dual;`. Replace 'MM-YYYY' with the month and year of interest. This query leverages the LAST_DAY function to find the last day of the month and the EXTRACT function to retrieve the day portion, providing the total number of days.

Questions and answers

  1. How does the LAST_DAY function work in Oracle SQL?

    The LAST_DAY function returns the last date of the month for a given date, which is useful to determine month-ending dates in queries.

  2. Can I find the number of days in a month for any year using this query?

    Yes, by replacing 'MM-YYYY' in the TO_DATE function with the desired month and year, you can get the number of days for that specific month.

  3. Is there an alternative method to get the days in a month in Oracle SQL?

    While LAST_DAY combined with EXTRACT is the most straightforward way, you could also calculate days by date arithmetic, but it’s less efficient and more complex.

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