Rank function in MySQL assign a rank - mysql

Question

I need to assign a rank to TC5 not the id.
SELECT a.id, a.user_id, a.tc1, a.tc4, min(a.tc5), a.tc2, b.avatar, c.username, #curRank := #curRank + 1 AS Rank
FROM
treningove_casy a INNER JOIN
sn_users b ON a.user_id=b.id INNER JOIN
users c ON a.user_id=c.id , (SELECT #curRank := 0) r
WHERE a.tc2 LIKE 'Motokáry Modrice'
GROUP BY a.user_id
So how is the picture. Please help
The modified code
SELECT x.*, (#curRank := #curRank + 1) as Rank
FROM (SELECT a.id, a.user_id, a.tc1, a.tc4, min(a.tc5) as tc5,
a.tc2, b.avatar, c.username,
FROM sbhgl_chronoengine_chronoforms_datatable_treningove_casy a INNER JOIN
sbhgl_jsn_users b
ON a.user_id = b.id INNER JOIN
sbhgl_users c
ON a.user_id = c.id
WHERE a.tc2 LIKE 'Motokáry Modřice'
GROUP BY a.user_id
) x CROSS JOIN
(SELECT #curRank := 0) params
ORDER BY tc5 DESC;

Answer 1

SELECT a.id, a.user_id, a.tc1, a.tc4, a.tc2, b.avatar, c.username,
(select rank from (SELECT
IF (#score=s.tc5, #rank:=#rank, #rank:=#rank+1) rank,
#score:=s.tc5 tc5s
FROM treningove_casy s,
(SELECT #score:=0, #rank:=0) r
ORDER BY tc5 DESC) s ) as rank
FROM
treningove_casy a INNER JOIN
sn_users b ON a.user_id=b.id INNER JOIN
users c ON a.user_id=c.id , (SELECT #curRank := 0) r
WHERE a.tc2 LIKE 'Motokáry Modrice'
GROUP BY a.user_id
You can try above solution, Hope this will help you.

Answer 2

In MySQL, you typically use variables for ranks. In your case, you would use a subquery. I find that the variable method doesn't always work with GROUP BY:
SELECT x.*, (#curRank := #curRank + 1) as Rank
FROM (SELECT a.id, a.user_id, a.tc1, a.tc4, min(a.tc5) as tc5,
a.tc2, b.avatar, c.username,
FROM treningove_casy a INNER JOIN
sn_users b
ON a.user_id = b.id INNER JOIN
users c
ON a.user_id = c.id
WHERE a.tc2 LIKE 'Motokáry Modrice'
GROUP BY a.user_id
) x CROSS JOIN
(SELECT #curRank := 0) params
ORDER BY tc5 DESC;
Note: The use of table aliases is good. It is much easier to understand a query, though, if the aliases are abbreviations for the table names.