CREATE TABLE `players` (
`pid` int(2) NOT NULL AUTO_INCREMENT,
`name` varchar(50) NOT NULL,
`team` varchar(20) NOT NULL,
`age` int(2) NOT NULL,
PRIMARY KEY (`pid`),
UNIQUE KEY `name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
INSERT INTO `players` (`pid`, `name`, `age`, `team`) VALUES
(1, 'Samual', 25, 'aa'),
(2, 'Vino', 20, 'bb'),
(3, 'John', 20, 'dd'),
(4, 'Andy', 22, 'cc'),
(5, 'Brian', 21, 'dd'),
(6, 'Dew', 24, 'xx'),
(7, 'Kris', 25, 'qq'),
(8, 'William', 26, 'cc'),
(9, 'George', 23, 'nn'),
(10, 'Peter', 19, 'aa'),
(11, 'Tom', 20, 'aa'),
(12, 'Andre', 20, 'aa');
In the above table, I want this query to fetch the ranking of the players in descending order of their scores.
SELECT pid, name, age, team, rank FROM
(SELECT pid, name, age, team,
@curRank := IF(@prevRank = age, @curRank, @incRank) AS rank,
@incRank := @incRank + 1,
@prevRank := age
FROM players p, (
SELECT @curRank :=0, @prevRank := NULL, @incRank := 1
) r
ORDER BY age DESC) s WHERE team='aa'
It gave me the result below:
Name | Age | Rank
####--------------------------------
Samual | 25 | 2
Tom | 20 | 8
Andre | 20 | 8
Peter | 19 | 12
But I want the results to be returned in this manner:
Name | Age | Rank
####--------------------------------
Samual | 25 | 1
Tom | 20 | 2
Andre | 20 | 2
Peter | 19 | 4
Therefore, making the query to give me the rank within a particular group.
You need to move the where clause inside the query as
SELECT pid,
name,
age,
team,
rank
FROM (
SELECT pid, name, age, team,
@curRank := IF(@prevRank = age, @curRank, @incRank) AS rank,
@incRank := @incRank + 1,
@prevRank := age
FROM players p, (SELECT @curRank :=0, @prevRank := NULL, @incRank := 1) r
WHERE team='aa'
ORDER BY age DESC
) s
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