Total Unique users for 30 days
2076
Trailing Sum Query
130040
Rolling count of total transactions over time
49580
Include the "People Reached" and "Helpful Flags (count)" data in SEDE
98096
Group of $r$ people at least three people have the same birthday?
120046
How many flags does a user have per day?
19952
Counting DISTINCT over multiple columns
153614
Number of weeks between dates
92715
How to determine current users who are logged in using a specific domain? | UNIX
3453
Filter users by country
22176
Keep short history of user display names
121295
How do I identify all super users in SQL Server?
6116
View approximate number of users online
158722
how to verify users are in group
69570
How to count number of distinct values in a range?
157049
How do I keep a user logged into my site for months?
110171
How to limit the number of active logins per user?
68980
Check if user is in a specified group