Question

Had anyone any idea how to query a vbulletin database to generate a report on the number of registrations per month/year to achive results like..

MM/YYYY      Count
01/2001  :   10
02/2001  :   12
...
...

Thanks to those answers below.. My final version that works is as follows:

SELECT 
  COUNT(*) as 'Registrations', 
  YEAR(FROM_UNIXTIME(joindate)) as 'Year',
  MONTH(FROM_UNIXTIME(joindate)) as 'Month'
FROM vbfuser
GROUP BY Year,Month

Answer 1

I am not familiar with vBulletin’s database structure, but you should do something like this, assuming your user table has a date/datetime/timestamp created_date or reg_timestamp column or something similiar, using MySQL’s YEAR() and MONTH() functions.

select 
    count(*) as count, 
    year(reg_timestamp) as year 
    month(reg_timestamp) as month
from users 
group by year, month;

This will result in something similiar to this:

+-------+-------+------+
| count | month | year |
+-------+-------+------+
|     4 |    11 | 2008 | 
|     1 |    12 | 2008 | 
|   196 |    12 | 2009 | 
|   651 |     1 | 2010 | 
+-------+-------+------+

Edit: regarding Dave’s comment: vBulletin’s date seems to be stored in Unixtime format. In this case, simply wrapping the column with FROM_UNIXTIME will convert it to a readable MySQL date:

select 
    count(*) as count, 
    year(from_unixtime(reg_timestamp)) as year 
    month(from_unixtime(reg_timestamp)) as month
from users 
group by year, month;