CODEWITHSUNDEEP
phpmysqlgroup-bysumhighest
user3209031
user3209031

Reputation: 835

Get Highest amount , count of products / users

id | user_id | prd_id | amnt | dis 
1  |   1     |  10    |  200 | 23
2  |   2     |  10    |  300 | 11
3  |   3     |  20    |  100 | 26
4  |   2     |  20    |  50  | 12
5  |   4     |  30    |  100 | 22
6  |   2     |  40    |  600 | 18
7  |   2     |  30    |  100 | 16

I want 2 result from above table :

First by prod_id as below

prd_id |  user_id  | cont |   highestamt | disc
10     |   2       |  2   |   300        | 11
20     |   3       |  2   |   100        | 26
30     |   4       |  2   |   100        | 22
40     |   2       |  1   |   600        | 18

Second by user_id as below:

user_id | cont |  bid on prd_id    | winner on bid prod_id |  
1       |  1   |   10              |  -                    |   -
2       |  4   |   10,20,30,40     |  10,40                |
3       |  1   |   20              |  20                   |
4       |  1   |   30              |  30                   |

UPDATE : ex: above : user_id = 2 has bid on product 10,20,30,40 ( bid on prd_id ) hence his bidding cont = 4 ...and out of which he is winner in 10,40 ( winner on bid prod_id ) ..WHY ONLY 10,40 and not 30 ...bcz user_id =4 has bid on prd=30 with amt =100 and user_id =2 with amt=100 ..but first bid was made by user=4 on prd=30 hence he is winner for prd=30 ( for same amt )

Tried below query for by prd_id but it giving me some wrong result.

SELECT `prd_id`, `user_id` , count('prd_id') as cont , max(`amnt`) as highestamt,disc
FROM `proddtails` 
group by `prd_id` order by `prd_id`

above query result as below : ( user_id,disc not coming proper )

prd_id |  user_id  | cont |   highestamt | disc
10     |   2       |  2   |   300        | 11
20     |   2       |  2   |   100        | 11
30     |   2       |  1   |   100        | 11
40     |   2       |  1   |   600        | 11

For second by user_id I am not getting what will be query.

Thanks

UPDATE :

THANKS FOR HARSHIL : http://www.sqlfiddle.com/#!9/5325a6/5/1

but after some more entry i found this bug : http://www.sqlfiddle.com/#!9/e04063/1 for second : for user_id but works well for prd_id (first query )

user_id  cont   bid_on_prd_id   winner_on_bid_prod_id
1         1         10                  (null)
2         4     10,20,40,30            10,40,30
3         1        20                     20
4         1        30                     30

but i want as below :

without null user_id

user_id  cont   bid_on_prd_id   winner_on_bid_prod_id
2         4     10,20,30,40             10,40
3         1        20                     20
4         1        30                     30

with null user_id ( but in my wamp server i don't see null in winner_on_bid_prd_id for user_id =1 , i get value 10 instead of null )

user_id  cont   bid_on_prd_id   winner_on_bid_prod_id
1         1         10                  (null)
2         4     10,20,30,40             10,40
3         1        20                     20
4         1        30                     30

Upvotes: 3

Views: 105

Answers (1)

Harshil Doshi
Harshil Doshi

Reputation: 3592

For prd_id:

select t1.prd_id,t1.user_id,
 (select count(*) from tablename where prd_id = t1.prd_id)as cont,
t1.amnt as highststatment,
t1.dis as disc
from tablename t1
where (t1.prd_id,t1.amnt) in
(select prd_id, max(amnt) from tablename group by prd_id)
group by t1.prd_id;

For usr_id:

    select t1.user_id,
       count(*) as cont,
       Group_concat(t1.prd_id separator ',') as bid_on_prd_id,
       (select Group_concat(distinct t2.prd_id separator ',')
        from tablename t2 
        where t2.user_id = t1.user_id 
        and (t2.id) in 
                    (select min(id) from tablename
                        where (prd_id,amnt) in 
                                 (select prd_id,max(amnt) from tablename group by prd_id)
                      group by prd_id
                     )
         ) as winner_on_bid_prod_id
from tablename t1
group by t1.user_id
having winner_on_bid_prod_id IS NOT NULL;

Click here for UPDATED DEMO

Upvotes: 4

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