Question

I used to ask this question in this SO and already got the solution, however, that sql query produced only partial correct result. I have tried to figure it out but it seem to complicate for me to understand. So would you please kindly help me. Thank you.

for table tbl_sActivity

   act_id| Client_id | act_status| user_id | act_date 
    1    |      7    |    warm   |     1   | 19/7/12 
    2    |      7    |    dealed |     1   | 30/7/12 <- lastest status of client(7)          
    3    |      8    |    hot    |     1   | 6/8/12  <- lastest status of client(8)
    4    |      5    |    cold   |    22   | 7/8/12  <- lastest status of client(5)
    5    |      6    |    cold   |     1   | 16/7/12
    6    |      6    |    warm   |     1   | 18/7/12
    7    |      6    |    dealed |     1   | 7/8/12  <- lastest status of client(6)   
    8    |      9    |    warm   |    26   | 2/8/12
    9    |     10    |    warm   |    26   | 2/8/12  
    10   |      9    |    hot    |    26   | 4/8/12  <- lastest status of client(9)
    11   |     10    |    hot    |    26   | 4/8/12
    12   |     10    |    dealed |    26   | 10/8/12 <- lastest status of client(10)
    13   |     13    |    dealed |    26   | 8/8/12  <- lastest status of client(13)
    14   |     11    |    hot    |    25   | 8/8/12
    15   |     11    |    dealed |    25   | 14/8/12 <- lastest status of client(11)

I want to produce the User Progressive Report that shows the latest progress of how each user follow up his/her clients.
Therefore this report must show number of each user’s clients group by each of their latest status.

The correct output should be looked like this..

user_id | act_status | Count(act_status)
1       |   dealed   |    2
1       |    hot     |    1
22      |    cold    |    1 
25      |   dealed   |    1
26      |    hot     |    1
26      |   dealed   |    2

The SQL query that I had is below:

select user_id, act_status, count(act_Status)
from your_table
where act_date in (
    select  max(act_date)
    from your_table
    group by Client_id
)
group by user_id, act_status

which when i add more transactions to the database, the output went wrong like this..

user_id | act_status | Count(act_status)
1       |   dealed   |    2
1       |    hot     |    1
22      |    cold    |    1
25      |    hot     |    1 ** (this one shouldn't show up)
25      |   dealed   |    1
26      |    hot     |    2 ** (should be only '1')
26      |   dealed   |    2

Answer 1

Tried and tested:

SELECT S.user_id, S.act_status, Count(S.act_status) AS CountOfact_status
FROM tbl_sActivity AS S INNER JOIN [SELECT A.client_id, Max(A.act_date) AS max_act
FROM tbl_sActivity AS A
GROUP BY A.client_id]. AS S2 ON (S.act_date = S2.max_act) AND (S.client_id = S2.client_id)
GROUP BY S.user_id, S.act_status

A similar request to an answer I gave yesterday, please try and read through my query as well as just using it, this will hopefully help you understand and is the only way to learn : )