Question

我想在我的查询中设置count(t.name)来计算行数，但是一旦我添加count(t.name) order by被忽略 - 我仍然会得到结果和正确的行数，但顺序错误。

SELECT t.name, t.team_id, count(t.name) as count
               FROM st_team t INNER JOIN st_position p
               ON t.team_id = p.team_id
               WHERE p.league_id = '$league_id'
               AND p.type = 'full'
               AND p.grid = '0'
               ORDER BY t.name
               LIMIT 0,1

我认为它必须与't'有关。前缀，但尝试各种组合并没有让我在任何地方。

任何帮助非常感谢，欢呼P

Answer 1

如果你需要Count，你需要Group by：

           AND p.grid = '0'
           GROUP BY t.name
           ORDER BY t.name
           LIMIT 0,1

Answer 2

由于您使用的是摘要功能（COUNT），因此查询中需要GROUP BY语句。

SELECT
    t.name,
    t.team_id,
    COUNT(t.name) as count
FROM
    st_team t
        INNER JOIN
    st_position p USING(team_id)
WHERE
    p.league_id = '$league_id'
    AND p.type = 'full'
    AND p.grid = '0'
GROUP BY 1, 2
ORDER BY 1  --This orders by t.name in ascending order. Change to 3 DESC to order by count descending
LIMIT 0,1;

Mysql Count忽略了顺序

2 个答案: