根据2个条件选择行

Question

I have 2 tables, records:

CREATE TABLE IF NOT EXISTS `records` (
`recordid` int(11) NOT NULL AUTO_INCREMENT,
`userid` int(11) NOT NULL,
`platform` varchar(255) NOT NULL,
`track` varchar(255) NOT NULL,
`trackid` int(11) NOT NULL,
`bike` varchar(255) NOT NULL,
`time` decimal(7,3) NOT NULL,
`faults` int(11) NOT NULL,
`date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`verified` varchar(3) NOT NULL DEFAULT 'no',
`wr` varchar(3) NOT NULL DEFAULT 'no',
PRIMARY KEY (`recordid`),
KEY `userid` (`userid`)
)

and users:

CREATE TABLE IF NOT EXISTS `users` (
`userid` int(11) NOT NULL AUTO_INCREMENT,
`email` varchar(255) NOT NULL,
`username` varchar(255) NOT NULL,
`password` varchar(255) NOT NULL,
`country` varchar(50) NOT NULL,
`verified` varchar(3) NOT NULL DEFAULT 'no',
PRIMARY KEY (`userid`)
) 

I have some example data stored:

 +----------+--------+----------+----------------+---------+-----------+---------+--------+---------------------+----------+-----+
| recordid | userid | platform |     track      | trackid |   bike    |  time   | faults |        date         | verified | wr  |
+----------+--------+----------+----------------+---------+-----------+---------+--------+---------------------+----------+-----+
|      412 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 90.456  |      6 | 2017-02-18 19:54:27 | yes      | yes |
|      413 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 75.458  |      4 | 2017-02-18 19:54:39 | yes      | yes |
|      414 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 77.885  |      2 | 2017-02-18 19:55:02 | yes      | yes |
|      415 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 59.441  |      1 | 2017-02-18 19:55:12 | yes      | yes |
|      416 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 52.145  |      0 | 2017-02-18 19:55:21 | yes      | yes |
|      417 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 48.444  |      0 | 2017-02-18 19:55:26 | yes      | yes |
|      418 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 42.753  |      0 | 2017-02-18 19:55:33 | yes      | yes |
|      419 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 39.701  |      0 | 2017-02-18 19:55:42 | yes      | yes |
|      420 |      1 | Xbox     | Inferno IV     |      40 | Pit Viper | 745.159 |    254 | 2017-02-18 20:17:35 | yes      | yes |
|      421 |      1 | Xbox     | Inferno IV     |      40 | Pit Viper | 575.169 |    128 | 2017-02-18 20:17:50 | yes      | yes |
|      422 |      1 | Xbox     | Inferno IV     |      40 | Pit Viper | 465.456 |    101 | 2017-02-18 20:18:12 | yes      | yes |
|      423 |      1 | Xbox     | Inferno IV     |      40 | Pit Viper | 321.247 |     75 | 2017-02-18 20:18:29 | yes      | yes |
|      424 |      1 | Xbox     | Inferno IV     |      40 | Pit Viper | 236.456 |     35 | 2017-02-18 20:18:58 | yes      | yes |
|      425 |      1 | Xbox     | Inferno IV     |      40 | Pit Viper | 165.359 |     25 | 2017-02-18 20:19:17 | yes      | yes |
|      426 |      1 | Xbox     | Waterworks     |       2 | Pit Viper | 45.452  |    457 | 2017-02-18 23:13:12 | yes      | yes |
|      427 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 34.123  |      0 | 2017-02-18 23:21:47 | yes      | yes |
|      428 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 32.254  |      0 | 2017-02-18 23:24:32 | yes      | yes |
|      429 |      1 | Xbox     | Turbine Terror |       1 | Pit Viper | 31.169  |      0 | 2017-02-18 23:25:33 | yes      | yes |
|      430 |      1 | Xbox     | Waterworks     |       2 | Pit Viper | 50.000  |      0 | 2017-02-20 20:06:23 | yes      | yes |
|      431 |      3 | Xbox     | Turbine Terror |       1 | Pit Viper | 25.123  |      0 | 2017-02-20 20:21:54 | no       | yes |
+----------+--------+----------+----------------+---------+-----------+---------+--------+---------------------+----------+-----+

I have a query in development:

SELECT users.username, 
       records.platform, 
       records.track, 
       records.bike,  
       records.time, 
       records.faults, 
       records.date 
FROM records 
INNER JOIN users 
   ON records.userid = users.userid 
INNER JOIN (SELECT track, time, MIN(faults) AS faults 
            FROM records GROUP BY track) AS tracksWithMinFaults 
   ON records.track = tracksWithMinFaults.track 
  AND records.faults = tracksWithMinFaults.faults 
WHERE users.userid = 1  
ORDER BY records.trackid ASC

The results from the query on the data set above:

+----------------+----------+----------------+-----------+---------+--------+---------------------+
|    username    | platform |     track      |   bike    |  time   | faults |        date         |
+----------------+----------+----------------+-----------+---------+--------+---------------------+
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 52.145  |      0 | 2017-02-18 19:55:21 |
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 48.444  |      0 | 2017-02-18 19:55:26 |
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 42.753  |      0 | 2017-02-18 19:55:33 |
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 39.701  |      0 | 2017-02-18 19:55:42 |
| TheRealTeeHill | Xbox     | Inferno IV     | Pit Viper | 165.359 |     25 | 2017-02-18 20:19:17 |
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 34.123  |      0 | 2017-02-18 23:21:47 |
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 32.254  |      0 | 2017-02-18 23:24:32 |
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 31.169  |      0 | 2017-02-18 23:25:33 |
| TheRealTeeHill | Xbox     | Waterworks     | Pit Viper | 50.000  |      0 | 2017-02-20 20:06:23 |
+----------------+----------+----------------+-----------+---------+--------+---------------------+

A little background: I am trying to pull the "best" record for each track for a given user ID. The best record can be defined as the record with the lowest faults and lowest time. The query I have developed so far is pulling all the records for a user that have the lowest faults. The query does not consider time yet!

My question: How do I find the lowest time for each track with the lowest faults?

This is my first post on StackOverflow, if I've missed anything or done something wrong please let me know. Thanks in advance for your time :)

Edit: I can't see a solution in the suggested duplicate post as I am looking for 2 minimum values, first I need to pull all of the lowest fault records, which my query is doing, and then pull the lowest time records from that set? If the solution is in that other post I cannot see it :(

This is the result I'm trying to achieve:

+----------------+----------+----------------+-----------+---------+--------+---------------------+
|    username    | platform |     track      |   bike    |  time   | faults |        date         |
+----------------+----------+----------------+-----------+---------+--------+---------------------+
| TheRealTeeHill | Xbox     | Inferno IV     | Pit Viper | 165.359 |     25 | 2017-02-18 20:19:17 |
| TheRealTeeHill | Xbox     | Turbine Terror | Pit Viper | 31.169  |      0 | 2017-02-18 23:25:33 |
| TheRealTeeHill | Xbox     | Waterworks     | Pit Viper | 50.000  |      0 | 2017-02-20 20:06:23 |
+----------------+----------+----------------+-----------+---------+--------+---------------------+

Answer 1

Use variables to create a row_number for each track, but here I see you may have an issue with ties. Not sure how you want handle those.

DEMO

SELECT *
FROM (
        SELECT records.userid, 
               records.platform, 
               records.track, 
               records.bike,  
               records.time, 
               records.faults, 
               records.date,
               @row := IF( @track = records.track, 
                           @row + 1,
                           IF(@track := records.track, 1, 1)
                         ) as rn
        FROM records 
        CROSS JOIN (SELECT @row := 0, @track := '') as par
        WHERE records.userid = 1
        ORDER BY records.trackid ASC,
                 records.faults ASC,
                 records.time ASC
     ) as T
WHERE T.rn = 1;     

OUTPUT

Answer 2

try this

   SELECT 
         users.name,records.platform,records.track,records.min_time,records.bike,records.time,records.min_faults,records.date  
   FROM users 
   INNER JOIN 
   (SELECT MIN(time) as min_time,time, MIN(faults) AS min_faults,faults,platform,track,bike,date   FROM records GROUP BY trackid) records 
   ON records.time = records.min_time  
   AND records.faults = records.min_faults  
   AND records.recordid = users.userid  
   WHERE users.userid = 1    
   ORDER BY records.trackid ASC;