How to create grouped daily,weekly and monthly reports including calculated fields in SQL Server

Question

I'm using SQL Server (2012), and using the two (simplified) tables below, how do I create 3 separate reports (daily, weekly and monthly) and include the following calculated fields:

1. new users created in this period
2. total number of users at this time


**Users**
userID          int
name            varchar(80)
userCreated     datetime


**Orders**
orderID         int
userID          int
orderCreated    datetime

I've been messing around with this code:

SELECT CAST(DATEPART(dd,userCreated) as VARCHAR(2)) + '/' + CAST(DATEPART(mm,userCreated) AS VARCHAR(2)) + '/' + CAST(DATEPART(yyyy,userCreated) AS VARCHAR(4)) [Date],
    count(*) newSignUps,
    (select count(*) from users u2 WHERE u2.userCreated < u1.userCreated)
FROM users u1
WHERE userCreated BETWEEN '05/01/2014 00:00:00.000' and '05/31/2014 23:59:59.000'
GROUP BY DATEPART(dd,userCreated), DATEPART(mm,userCreated), DATEPART(yyyy,userCreated),userCreated

But to show anything, it needs the "userCreated" field added to the grouping...

For the reports I need to show:

Daily:

date          new sign ups        users in system
17/03/2013    10                  100
18/03/2013    4                   104
19/03/2013    8                   112

Weekly:

week
13             8                   40
14             2                   42
15             5                   47

Monthly:

Jan            3                   54
Feb            9                   63
Mar            2                   65

I hope this makes sense? Thank you...

Answer 1

I'm not sure if I understood your question correctly, but this gives you all the users created per day:

SELECT year(userCreated), month(userCreated), day(userCreated), count(*)
FROM Users
GROUP BY year(userCreated), month(userCreated), day(userCreated)

this one by month:

SELECT year(userCreated), month(userCreated), count(*)
FROM Users
GROUP BY year(userCreated), month(userCreated)

and this one by week:

SELECT year(userCreated), datepart(week, userCreated), count(*)
FROM Users
GROUP BY year(userCreated), datepart(week, userCreated)

Edit according to you the missing total field I give you here the example for the month query:

SELECT year(userCreated), month(userCreated), count(*) AS NewCount,
(SELECT COUNT(*) FROM Users u2 WHERE 
    CAST(CAST(year(u1.userCreated) AS VARCHAR(4)) + RIGHT('0' + CAST(month(u1.userCreated) AS VARCHAR(2)), 2) + '01' AS DATETIME) > u2.userCreated) AS TotalCount
FROM Users u1
GROUP BY year(userCreated), month(userCreated)

Hope this helps for the other two queries.

Answer 2

DAILY

select count(UserId),userCreated     
from User WHERE CONDITION group by CreatedOn

MONTHLY

select count(UserId),
LEFT(CONVERT(varchar, userCreated ,112),6) from User 
WHERE CONDITION  group by LEFT(CONVERT(varchar, userCreated ,112),6) 

OR

select count(UserId),
month(userCreated ) 
from User group by month(userCreated ) 

WEEKLY

select count(UserId),
DATEPART( wk, userCreated) 
from User WHERE CONDITION  group by DATEPART( wk, userCreated     ) 

FOR BOTH NEW and EXISTING USER COUNT (i did for monthly)

select new,
(select count(UserId) from User where month(userCreated)<=monthwise) as total,
monthwise
FROM (

select count(UserId) as new,

month(userCreated)as monthwise from User group by month(userCreated) 
)tmp