Latest updated time value per group of rows

I have a table that looks like this:

DeliveryID    LastUpdatedTime
    1             5:25AM
    1             5:30AM
    2             5:35AM
    2             5:40AM

For each deliveryID, the update time varies.

I want a query that will give me the maximum time for each deliveryID (for DeliveryID 1 it is 5:30AM), and it should also take into consideration DeliveryIDs that have only one updateTime.


    Requires Free Membership to View

    Login

This is pretty straighforward --

select DeliveryID, max(LastUpdatedTime)
  from yourTable
group by DeliveryID

This works whether there's one row per DeliverID group or several.

For More Information

  • What do you think about this answer? E-mail the edtiors at editor@searchDatabase.com with your feedback.
  • The Best SQL Web Links: tips, tutorials, scripts, and more.
  • Have an SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
  • Ask your technical SQL questions -- or help out your peers by answering them -- in our live discussion forums.
  • Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.

This was first published in January 2002

Join the conversationComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.
    Back to top