I'm currently working on a league systeme for my sport team. A ladder, as seen as in some video games.
It's a mobile web site, allowing coaches to create games, and monitor players performances.
I have games automatically balanced, taking into accounts player's experiences and points, then, i give bonus points to the all the players of the winner team, and remove points from the losers.
I have a relatively simple database. 3 tables.
User : id - name
Games : id - ETA - cration_date
game_joueur: id- id_game - id_joueur - team - result - bonus
game_joueur beeing an assoc table, in wich i register for each new game players id, the team he has been seeded on, and afterwards, update the bonus field with the points earned and the result field with an integer (1 = lose, 2= win)
That way i can sum the bonus on my players stat and get the total points.
You can have a better look at the table here :
http://sqlfiddle.com/#!2/d3e06/2
What i'm tryng to acomplish is for each player's stat page, retrieve from the database the name of his most succesfull partner( the guy wich whom he won the most games), and also his worst ally , the men he lost the most match with.
This is what i do on my user stat page :
SELECT
(SELECT COUNT(lad_game_joueur.result) FROM lad_game_joueur WHERE result = 1 AND lad_game_joueur.id_joueur = lad_user.id) as lose,
(SELECT SUM(lad_game_joueur.bonus) FROM lad_game_joueur WHERE lad_game_joueur.id_joueur = lad_user.id) as points,
lad_user.id as id ,
(SELECT COUNT(lad_game_joueur.result) FROM lad_game_joueur WHERE lad_game_joueur.id_joueur = lad_user.id AND result =2) as win,
lad_user.name
FROM lad_user,lad_game_joueur
WHERE lad_game_joueur.id_joueur = lad_user.id AND lad_user.id
='.$id_joueur.'
GROUP BY lad_user.id
ORDER BY puntos DESC
I'm sure this is not the best way to do it, but it works :) ( i'm no sql specialist)
How can i tune this query to also retrive the informations i'm looking for?
I wont mind doing another query.
Thanks a lot in advance!
Ben
Ok i finealy found a way.
Here's what i did :
SELECT
SUM(result)as result_sum, sum(Bonus) as bonus_sum, id_joueur
from lad_game_joueur
where result= 2
and id_game in
(SELECT lad_game_joueur.id_game from lad_game_joueur,lad_game where id_joueur=2
AND result= 2 and lad_game_joueur.id_game=lad_game.id)
group by id_joueur
order by result_sum DESC, bonus_sum desc
As you see, the sum of result would give me 4 if i won two games with the person, but i just divide by 2 on php and voilà :)
Related
I have a table in my database which contains data for recording games between people. I wanted to have a query that would return the game which was closest between two players, ie, the smallest difference between the two scores recorded, regardless of who won. I have started with something like this as a query, but I can't quite get what I want.
SELECT recorder_score, opponent_score
from games
where recorder_id = $recorder_id
order by (recorder_score - opponent_score)
limit 1
The above obviously would only return the closest game that the person submitting the game has won, but as I mentioned, I want the closest game regardless of who wins. What will be the best way of doing this?
Use ABS in Order by to get the closest game between two players
SELECT recorder_score, opponent_score
from games
where recorder_id = $recorder_id
order by ABS(recorder_score - opponent_score)
limit 1
I'm fairly new to php / mysql programming and I'm having a hard time figuring out the logic for a relational database that I'm trying to build. Here's the problem:
I have different leaders who will be in charge of a store anytime between 9am and 9pm.
A customer who has visited the store can rate their experience on a scale of 1 to 5.
I'm building a site that will allow me to store the shifts that a leader worked as seen below.
When I hit submit, the site would take the data leaderName:"George", shiftTimeArray: 11am, 1pm, 6pm (from the example in the picture) and the shiftDate and send them to an SQL database.
Later, I want to be able to get the average score for a person by sending a query to mysql, retrieving all of the scores that that leader received and averaging them together. I know the code to build the forms and to perform the search. However, I'm having a hard time coming up with the logic for the tables that will relate the data. Currently, I have a mysql table called responses that contains the following fields,
leader_id
shift_date // contains the date that the leader worked
shift_time // contains the time that the leader worked
visit_date // contains the date that the survey/score was given
visit_time // contains the time that the survey/score was given
score // contains the actual score of the survey (1-5)
I enter the shifts that the leader works at the beginning of the week and then enter the survey scores in as they come in during the week.
So Here's the Question: What mysql tables and fields should I create to relate this data so that I can query a leader's name and get the average score from all of their surveys?
You want tables like:
Leader (leader_id, name, etc)
Shift (leader_id, shift_date, shift_time)
SurveyResult (visit_date, visit_time, score)
Note: omitted the surrogate primary keys for Shift and SurveyResult that I would probably include.
To query you join shifts and surveys group on leader and taking the average then jon that back to leader for a name.
The query might be something like (but I haven;t actually built it in MySQL to verify syntax)
SELECT name
,AverageScore
FROM Leader a
INNER JOIN (
SELECT leader_id
, AVG(score) AverageScore
FROM Shift
INNER JOIN
SurveyResult ON shift_date = visit_date
AND shift_time = visit_time --depends on how you are recording time what this really needs to be
GROUP BY leader ID
) b ON a.leader_id = b.leader_id
I would do the following structure:
leaders
id
name
leaders_timetabke (can be multiple per leader)
id,
leader_id
shift_datetime (I assume it stores date and hour here, minutes and seconds are always 0
survey_scores
id,
visit_datetime
score
SELECT l.id, l.name, AVG(s.score) FROM leaders l
INNER JOIN leaders_timetable lt ON lt.leader_id = l.id
INNER JOIN survey_scores s ON lt.shift_datetime=DATE_FORMAT('Y-m-d H:00:00', s.visit_datetime)
GROUP BY l.id
DATE_FORMAT here helps to cut hours and minutes from visit_datetime so that it could be matched against shift_datetime. This is MYSQL function, so if you use something else you'll need to use different function
Say you have a 'leader' who has 5 survey rows with scores 1, 2, 3, 4 and 5.
if you select all surveys from this leader, sum the survey scores and divide them by 5 (the total amount of surveys that this leader has). You will have the average, in this case 3.
(1 + 2 + 3 + 4 + 5) / 5 = 3
You wouldn't need to create any more tables or fields, you have what you need.
I'm currently trying to get the following data:
UserName, UserImageURL, Total Games Played, Games Completed, Games Lost, Average Won (as percentage) and Points of the user
And as well another set of data:
User Statistics data such as:
Most Games Played on League: 23 - Monster Killers
Games Most Won On: 19/23 - Monster Killers
Games Most Lost On: 3/32 - Frog Racers
Your Game Winning Accuracy (total from all games) - 68% accuracy
Site Stats:
Most Games Played on League: 650 - Helicopter Run
Top Game Played: 1200 - Monster Killers
Whole site winning accuracy: 82%
I have the following Tables:
-User Table-
userID (int-pk), userName (varchar), userImageUrl (text)
-Games table-
gameId (int-pk), gameName (varchar), gameUserID (int), gameLeagueId (int), score1 (int), score2 (int), gameResultOut (0 or 1), gameWon (0 or 1)
-UserBalance table-
ubId(int-pk) userId (int) balance (int)
-League table-
leagueId (int-pk) leagueName (varchar)
Just to give you a heads up on what's happening, when a user plays a game and chooses some results a row is inserted into the games table. Since the game is time based, when the results are out, there is a check that checks if there are any games which have that id and will update the gameResultOut to 1 and gameWon to 1 or 0 according to what the user had selected as a score.
I tried the following:
SELECT u.userID, u.userName, u.userImageUrl, l.leagueName ,
COUNT(g.gameId) AS predTotal,
(SELECT COUNT(g.gameId) FROM games AS g WHERE g.gameResultOut = 1 AND g.gameWon = 1) AS gamesWon,
(SELECT COUNT(g.gameId) FROM games AS g WHERE g.gameResultOut = 1 AND g.gameWon = 0) AS gamesLost,
ub.balance
FROM games AS g
LEFT JOIN league AS l ON l.leagueId = g.gameLeagueId
LEFT JOIN user AS u ON u.user_id = g.gameUserID
LEFT JOIN user_balance AS ub ON ub.userId = u.userID
WHERE l.leagueId = 4
GROUP BY u.userId
ORDER BY ub.balance DESC
I can calculate easily the win percentage after the query so that's not a problem, but the result for the Wins and Lost are all the same and even when it comes to changing the leageId, the results are still the same which is not what I want.
Can anyone help?
Thanks & Regards,
Necron
As far as I see, the games table stores games that users played. So, in order to know how many games each user played/won/lost, you're missing the link in the subqueries between games and users.
Your subqueries are:
(SELECT COUNT(g.gameId ) FROM games AS g WHERE g.gameResultOut = 1 AND g.gameWon = 1) AS gamesWon,
(SELECT COUNT(g.gameId) FROM games AS g WHERE g.gameResultOut = 1 AND g.gameWon = 0) AS gamesLost,
And they should be:
(SELECT COUNT(gw.gameId ) FROM games AS gw WHERE gw.gameResultOut = 1 AND gw.gameWon = 1 AND gw.gameUserID = u.user_id) AS gamesWon,
(SELECT COUNT(gl.gameId) FROM games AS gl WHERE gl.gameResultOut = 1 AND gl.gameWon = 0 AND gl.gameUserID = u.user_id) AS gamesLost,
I guess this is what you're looking for :)
EDIT based on comments, adding tips for User and Site statistics:
For those information you'll need to perform several distinct queries, as most of them are going to sum some values and/or group by a given column, which won't fit for another query. I'll try to give you some ideas so you can work on them.
User Statistics
Most Games Won or Lost
The previous answer for the query you provided counts how many times user has lost/won any game, but does not distinct this data between games.
So, if you want to know in which game user has most wins/losses, you should have something like this:
SELECT
g.gameName,
-- How many times the user won per game
(SELECT COUNT(gw.gameId) FROM games gw WHERE gw.gameResultOut = 1 AND gw.gameWon = 1 AND gw.gameUserID = u.user_id) AS gamesWon,
-- How many times the user payed each game
COUNT(g.gameId) AS gamesPlayed,
-- The Win Ratio. This may need a little work on, depending on what you want.
-- Be aware that if a user played a game 1 time and won, it's ratio will be 1 (100%)
-- So maybe you'll want to add your own rule to determine which game should show up here
(gamesWon / gamesPlayed) AS winRatio
FROM
games g
INNER JOIN user u ON u.user_id = g.gameUserID
-- Groups and counts data based on games + users
GROUP BY g.gameId, u.user_id
-- Now you order by the win ratio
ORDER BY winRatio DESC
-- And get only the first result, which means the game the player has most wins.
LIMIT 1
For lost games, it's pretty much the same query, changing the desired fields and maths.
Game winning accuracy
Somewhat the previous query, except that you won't group by the gameID anymore. Just group by the user and do your math.
Site Statistics
Well, as far as I see, we're still on a similar query. The difference is that for the whole Site statistics you won't ever group by user. You may group by game or league, depending on what you are trying to achieve.
Bottom line: looks that most queries are similar, you'll have to play with them and adapt for each information you need to retrieve. Please note that they might not work plenty as I could not test them on your DB. You may need to correct some inconsistence according to your database/tables schema.
I hope this may give you some insight to work on.
I own an online game in which you become the coach of a rugby team and I recently started to optimize my database. The website uses CodeIgniter framework.
I have the following tables (the tables have more fields but I posted only those which are important now):
LEAGUES: id
STANDINGS: league_id, team_id, points
TEAMS: id, active
Previously, I was having in the LEAGUES table a field named teams. This was representing the number of active teams in that league (of which users logged in recently).
So, I was doing the following select to get a random league that has between 0 and 4 active teams (leagues with less teams first).
SELECT id FROM LEAGUES WHERE teams>0 AND teams<4 ORDER BY teams ASC, RAND( ) LIMIT 1
Is there any way I can do the same command now without having to add the teams field?
Is it efficient? Or It's better to keep the teams field in the database?
LATER EDIT
This is what I did until now:
function test()
{
$this->db->select('league_id, team_id');
$this->db->join('teams', 'teams.id = standings.team_id');
$this->db->where('active', 0);
$query = $this->db->get('standings');
return $query->result_array();
}
The function returns all inactive teams alongside with their league_id.
Now how do I count the number of inactive teams in each league and how to I sort them after this number?
Try this:
select league_id
from standings s
join teams t on t.id = s.team_id and t.active
group by 1
having count(*) < 5
I'm building a website for a friend (kind of a hobby thing, not for anything pro/work related) that'll store information about players, games and scores. I have built most of the reporting/statistical info but I want to display how many times a player hit the max score and am wondering if I can improve my idea (based on sub-queries). My 'scores' table is set out as so:
scores (id, gameID, playerID, venueID, versusID, score1, score2, score3, score4, score5, total, seasonID) - all the xID's are foreign keys.
The premise is that a new entry is made per game, per player so I have PHP insert data from text fields etc. This means that say there's 20 games in a season and for score1 'John Smith' hits the max score of 10 4 times that season. But he also hits it 8 times on score2, 6 times on score3 etc (and obviously, these could be in different games). So at the end of the season, I have a big table with a load of results in (I'd have 240 rows given there's 12 players per team) and when I'm looking at my stats, I want to find out how many times John Smith hit a 10 that season. I can obviously do 5 queries (or 1 with sub-queries) and add the results to tell me this, but I'm wondering what's the best method (or the one the 'SQL guru' would use, if you like) purely for my own development.
So to finish: I'm hoping to run my query and get a resultset that tells me:
Name | Total
John Smith | 12
Rob Smith | 11
Will Smith | 11
etc... | 1
The firstName and secondName are stored in the 'player' table (which is linked to the 'scores' table by the playerID foreign key). I'd like to be able to modify the query later on-demand if I wish, for example if I wanted to see how many times players scored a 9 rather than a 10 (but that can obviously be done by passing the number via PHP).
Searching here (+ Google) has lead me down the 'JOIN' route but I've not had much success. Any help, please? :)
I think this should do the trick:
SELECT playerID, COUNT(playerID) AS Total FROM (
SELECT playerID FROM scores WHERE score1='10'
UNION ALL
SELECT playerID FROM scores WHERE score2='10'
UNION ALL
SELECT playerID FROM scores WHERE score3='10'
UNION ALL
SELECT playerID FROM scores WHERE score4='10'
UNION ALL
SELECT playerID FROM scores WHERE score5='10'
) AS thetable
GROUP BY playerID
Where 10 is the score you want.
This will get the playerID with respective number of 10 scores:
select
playerID,
count(score1 = 10 or null) +
count(score2 = 10 or null) +
count(score3 = 10 or null) +
count(score4 = 10 or null) +
count(score5 = 10 or null)
as total
from scores
group by playerID
having total > 0
Join it to the player table to get the names.