I'm trying the following
Table : teams_members
Id Team_id User_id
1 103 65524
14 103 65529
16 103 65530
17 103 65526
19 103 65528
Table : users
Id username
65524 Kaiprioska
65526 Darkstarling
65528 Metazoans98
65529 Darth Laser
65530 TheBourbonKid
Table : users_playeraccounts
Id user_id summoner_name rank_solo
7 65524 kaiprioska 19
8 65524 swaggapandaa 14
9 65524 Yolonese Prophet 12
10 65529 Darth Laser 15
11 65530 TheBourbonkid 18
12 65528 Metazoans98 9
13 65530 TheBourbonKid 12
What the result needs to be :
user_id summoner_name rank_solo
65524 kaiprioska 19
65529 Darth laser 15
65530 TheBourbonkid 18
65528 metazoans98 9
655529 darth laser 15
So every teammember I need the users_playeraccounts entry where rank_solo is max for that user_id. I can get the full list so every playeraccount for every member but not the max entry.
Any assistance would be greatly appreciated.
select user_id, summoner_name, max(rank_solo ) as rank_solo
from users_playeraccounts
group by user_id
Try this
SELECT USER_ID, SUMMONER_NAME, MAX(RANK_SOLO) FROM users_playeraccounts GROUP BY USER_ID
You'll need to query the table twice; once to get the highest ranks, and another to retrieve the records of them. (As an aside, if the user has two at highest rank, both with be in the results.)
SELECT q.user_id, q.summoner_name, q.rank_solo
FROM (
SELECT user_id, MAX(rank_solo) AS rank_solo
FROM users_playeraccounts
GROUP BY user_id
) As maxQ
INNER JOIN users_playeraccounts AS q USING (user_id, rank_solo)
GROUP BY q.user_id -- If you only want one per user.
;
SELECT u.id, u.username, solo_rank FROM (
SELECT [user_id] userID, MAX(rank_solo) solo_rank FROM users_playeraccounts GROUP BY [user_id]
) BestSoloRanking
JOIN users u ON BestSoloRanking.userID = u.id
Related
I have 2 tables, first one is called members:
id name show
1 John 1
2 Wil 1
3 George 1
4 Chris 1
Second is called score:
id user_id score
1 1 90
2 1 70
3 2 55
4 3 30
5 3 40
6 3 100
7 4 30
user_id from score is the id of members.
What I want is to show a scorelist with unique members.id, ordered by score.score and order by the latest score.id.
I use the following code:
SELECT members.id, members.show, score.id, score.user_id, score.score FROM members
INNER JOIN score ON score.user_id = members.id
WHERE members.show = '1'
GROUP BY score.user_id
ORDER BY score.score DESC, score.id DESC
The output is not ordered by the latest score.id, but it does show only unique user_id's:
id user_id score
1 1 90
3 2 55
4 3 30
7 4 30
It should be like:
id user_id score
6 3 100
2 1 70
3 2 55
7 4 30
I hope you can help me
You could use:
with cte as (
select id,
user_id,
score,
row_number() over(partition by user_id order by id desc) as row_num
from score
) select cte.id,user_id,score
from cte
inner join members m on cte.user_id=m.id
where row_num=1
order by score desc;
Demo
If your MySQL server doesn't support windows function, use:
select s.id,s.user_id,s.score
from score s
inner join members m on s.user_id=m.id
where s.id in (select max(id) as id
from score
group by user_id
)
order by score desc;
Demo
I'm trying to get the total number of levels gained or lost from this sort of table:
id name level timestamp
1 Rex 15 10:25
2 Rex 15 10:26
3 Rex 15 10:27
4 Rex 14 10:28
5 Rex 13 10:29
6 Rex 13 10:30
7 Rex 13 10:31
8 Rex 13 10:29
9 Xer 44 10:30
10 Xer 44 10:31
11 Xer 45 10:32
12 Xer 45 10:33
13 Xer 45 10:34
Currently I'm running
SELECT id, name, level, timestamp, MAX(level) - MIN(level) AS gained
FROM log
GROUP BY name
But the problem with this query is that both gained and lost levels will count as gained. It would be perfect if I could get a negative int in the gained column if the user has lost levels
The output I want from the data above is:
id name level timestamp gained
8 Rex 13 10:29 -2
13 Xer 45 10:34 1
If you need to respect the timeline, then try something like this:
SELECT MAX(id) id, name,
( SELECT level FROM log l0 WHERE l.name = l0.name ORDER BY timestamp DESC LIMIT 1 ) level,
MAX(timestamp) timestamp,
-- last entry for the name
( SELECT level FROM log l1 WHERE l.name = l1.name ORDER BY timestamp DESC LIMIT 1 ) -
-- first entry for the name
( SELECT level FROM log l2 WHERE l.name = l2.name ORDER BY timestamp ASC LIMIT 1 ) gained
FROM log l
GROUP BY name
I used LAG in as subquery to get the changes and then summed those changes in an outer sub-query. To get the last row I uses yet another query to find the max time for each name. Maybe not the most efficient query but it works
SELECT l.id, l.name, l.level, l.timestamp, sg.gain
FROM log l
JOIN (SELECT name, SUM(gain) gain
FROM (SELECT name, level - COALESCE(LAG(level) OVER w, level) as gain
FROM log
WINDOW w AS (PARTITION BY name ORDER BY timestamp)) as g
GROUP BY name) as sg ON sg.name = l.name
JOIN (SELECT name, MAX(time) max_t
FROM log
GROUP BY name) mt ON mt.name = l.name AND mt.max_t = l.time
The title makes it sound easy but what I'd like to do is get the last 20 groups from the groups table, ordered by their corresponding users last login date. A group can have one or more users and ultimately what I want to do is find out which groups have had the least user activity and retrieve the last login date.
Here's the query I came up with -
SELECT DISTINCT g.name, user_max.max_login_last_at FROM groups g
LEFT JOIN group_user gu on g.id = gu.group_id
LEFT JOIN (
SELECT MAX(login_last_at) max_login_last_at, u.id
FROM users u GROUP BY id
) AS user_max ON (user_max.id = gu.user_id)
ORDER BY user_max.max_login_last_at ASC
The problem is when I perform the join, it pulls in every group_user record and results in duplicates. I feel like there could be an easy solution to this one but I can't seem to figure it out!
groups table
id name
1 Group 1
2 Group 2
users table
id email login_last_at
1 user1#example.com 2018-10-17 16:08:47
2 user2#example.com 2018-10-02 15:41:53
3 user3#example.com NULL
4 user4#example.com 2018-10-08 12:01:48
5 user5#example.com 2018-10-15 9:24:57
6 user6#example.com 2018-10-17 11:10:58
7 user7#example.com 2018-10-17 15:33:03
group_user table
id group_id user_id
1 1 1
2 2 1
3 1 2
4 1 3
5 1 4
6 2 5
7 1 5
8 2 6
9 1 7
Current example result -
name max_login_last_ts
Group 1 2018-10-02 15:41:53
Group 1 2018-10-08 12:01:48
Group 2 2018-10-15 09:24:57
Group 1 2018-10-15 09:24:57
Group 2 2018-10-17 11:10:58
Group 1 2018-10-17 15:33:03
Group 1 2018-10-17 16:08:47
Group 2 2018-10-17 16:08:47
Group 1 2018-10-18 08:55:17
The problem is as you can see in the result above is that I'm getting all groups, all I really want is the following -
name max_login_last_ts
Group 2 2018-10-17 16:08:47
Group 1 2018-10-18 08:55:17
Thanks in advance!
I think this query will do what you want. There isn't enough data in your sample to replicate your desired results though.
SELECT g.name, MAX(u.login_last_at) AS max_login_last_at
FROM `groups` g
JOIN group_user gu on gu.group_id = g.id
JOIN users u ON u.id = gu.user_id
GROUP BY g.name
ORDER By max_login_last_at DESC
LIMIT 20
Demo on dbfiddle
In MySql I need to select top student in every class in a school in termid=10 to get discount for next term enrollment .
Please notice that total is not in table(I put in below for clearing problem)
I have this workbook table for all students workbook:
id studentid classid exam1 exam2 total termid
1 2 11 20 40 60 10
2 1 22 40 20 60 10
3 4 11 40 20 60 10
4 5 33 10 60 70 10
5 7 22 10 40 50 10
6 8 11 10 30 40 10
7 9 33 20 45 65 10
8 11 11 null null null 10
9 12 54 null null null 02
10 13 58 null null null 02
1st challenge is : exam1 and exam2 are VARCHAR and total is not in table (as i explained).
2nd challenge is : as you can see in id=8 std #11 has not numbers
3rd challenge is : may be two students have top level so they must be in result.
I need result as :
id studentid classid exam1 exam2 total termid
1 2 11 20 40 60 10
3 4 11 40 20 60 10
4 5 33 10 60 70 10
2 1 22 40 20 60 10
i have this query but not work good as i mention.
SELECT DISTINCT id,studentid,classid,exam1,exam2,total,termid ,(CAST(exam1 AS DECIMAL(9,2))+CAST(exam2 AS DECIMAL(9,2))) FROM workbook WHERE ClassId = '10';
You can get the total for the students by just adding the values (MySQL will convert the values to numbers). The following gets the max total for each class:
select w.classid, max(coalesce(w.exam1, 0) + coalesce(w.exam2, 0)) as maxtotal
from workbook w
group by w.classid;
You can then join this back to the original data to get information about the best students:
select w.*, coalesce(w.exam1, 0) + coalesce(w.exam2, 0) as total
from workbook w join
(select w.classid, max(coalesce(w.exam1, 0) + coalesce(w.exam2, 0)) as maxtotal
from workbook w
group by w.classid
) ww
on w.classid = ww.classid and (coalesce(w.exam1, 0) + coalesce(w.exam2, 0)) = ww.maxtotal;
Another approach is to join the table with itself. You find out the max for each class and then join all students of this class which match the class max:
max for each class (included in the final statement already):
SELECT classid, MAX(CAST(exam1 AS UNSIGNED) + CAST(exam2 AS UNSIGNED)) as 'maxtotal'
FROM students
WHERE NOT ISNULL(exam1)
AND NOT ISNULL(exam2)
GROUP BY classid
The complete statement:
SELECT s2.*, s1.maxtotal
FROM (SELECT classid, MAX(CAST(exam1 AS UNSIGNED) + CAST(exam2 AS UNSIGNED)) as 'maxtotal'
FROM students
WHERE NOT ISNULL(exam1)
AND NOT ISNULL(exam2)
GROUP BY classid) s1
JOIN students s2 ON s1.classid = s2.classid
WHERE s1.maxtotal = (CAST(s2.exam1 AS UNSIGNED) + CAST(s2.exam2 AS UNSIGNED));
SQL Fiddle: http://sqlfiddle.com/#!2/9f117/1
Use a simple Group by Statement:
SELECT
studentid,
classid,
max(coalesce(exam1,0)) as max_exam_1,
max(coalesce(exam2,0)) as max_exam_2,
sum(coalesce(exam1,0) + coalesce(exam2,0)) as sum_exam_total,
termid
FROM
workbook
WHERE
termid=10
GROUP BY
1,2
ORDER BY
5
Try something like this:
SELECT id,studentid,classid,exam1,exam2,(CAST(exam1 AS DECIMAL(9,2))+CAST(exam2 AS DECIMAL(9,2))) AS total,termid FROM `workbook` WHERE ((CAST(exam1 AS DECIMAL(9,2))+CAST(exam2 AS DECIMAL(9,2)))) > 50
Thanks all my friends
I think combine between 2 answer in above is best :
SELECT s2.*, s1.maxtotal
FROM (SELECT ClassId, MAX(
coalesce(exam1,0)+
coalesce(exam2,0)
) as 'maxtotal'
FROM workbook
WHERE
(
termid = '11'
)
GROUP BY ClassId) s1
JOIN workbook s2 ON s1.ClassId = s2.ClassId
WHERE s1.maxtotal = (
coalesce(exam1,0)+
coalesce(exam2,0)
) AND (s1.maxtotal >'75');
last line is good for s1.maxtotal=0 (some times student scores have not be entered and all equals 0 so all will shown as best students) or some times we need minimum score (to enroll in next term).
So thanks all
I want to get IDs of users which are subscribed to one post but in some other type.
Please check the table below
Table: subscribers
userid post_id notification_made
33 780 2
35 780 2
29 780 2
33 780 1
35 780 1
Here in above image, While inserting the last 2 records I used insert query to add 33 and 35 with notification_made = 1. Here I want to get the IDs of users who are in this table with same post_id (780) But those are not under same notification_id (1). So I need 29 Userid which is under same post_id but not under same notification_made.
Please help !
Thanks in advance.
Considering you have three parameters (two userids and a notification mode), and you want to insert, you can try:
INSERT INTO subscribers
SELECT DISTINCT a.userid, a.post_id, 1
FROM subscribers a
INNER JOIN
(
SELECT post_id
FROM subscribers
WHERE userid IN (33,35) AND notification_made = 1
GROUP BY post_id
HAVING COUNT(*) = 2
) b ON a.post_id = b.post_id
WHERE a.userid NOT IN (33,35) AND a.notification_made <> 1