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Editorial Team
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Asked: 2026-05-24T14:24:10+00:00

I have a table in an RDBMS which logs the user logins. A user

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I have a table in an RDBMS which logs the user logins.
A user can login to the system many times during the day and my application logs these logins.

The problem is, I need to write a query which gets the first login per day of the users between desired dates like 2011-04-21 to 2011-07-08

Login Log Table

userID  Login Date 
guess   2011-04-21 16:46:46.000
Admin   2011-05-03 17:32:15.000
guess   2011-05-05 15:48:54.000
guess   2011-06-01 14:14:50.000
guess   2011-06-01 14:23:18.000
my_user 2011-07-08 15:42:20.000
guess   2011-07-08 16:15:08.000
guess   2011-07-08 16:19:14.000
my_user 2011-07-08 16:36:45.000
my_user 2011-07-08 16:37:41.000
my_user 2011-07-08 16:42:21.000

Query Should give result like below (The first login date/time for each day)

UserID  First_Login_Date
guess   2011-04-21 16:46:46.000
Admin   2011-05-03 17:32:15.000
guess   2011-05-05 15:48:54.000
guess   2011-06-01 14:14:50.000
my_user 2011-07-08 15:42:20.000
guess   2011-07-08 16:15:08.000
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1 Answer

  1. Editorial Team
    SELECT UserID, MIN(Login_Date) as First_Login_Date
FROM Login
WHERE Login_Date BETWEEN inputStartDate AND inputEndDate
GROUP BY UserID, YEAR(Login_Date), MONTH(Login_Date), DAY(Login_Date)

    Edited to group BY user AND day. Your question was not specific that you wanted the first login of each user for each day they logged in. I’m positive this solution works for MS SQL Server 2005+, if you need a different RDBMS, comment.

    If you’d like more options for grouping by a certain date, feel free to look at this article.

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