Question

我在下面有sql，想要多个ORDER BY。

SELECT
    r.*,
    s.uzunluq,
    b.id,
    au.status_id as aksessuar_status,
    au.aksessuar_id,
    au.aksessuar
FROM
    seksiya s,
    result r
LEFT JOIN bosh_seksiya_aksessuar b
    ON
    b.bosh_seksiya = r.model AND
    b.ERK = :ses
LEFT JOIN aksessuar_up au
    ON au.model_id = r.res_id AND
    au.user_id = :user_id AND
    au.status_id = 9
WHERE 
    r.user_id = :user_id AND
    r.model=s.seksiya AND 
    s.erk = :ses AND
    r.status_id IN (1,2,3,4,5)
ORDER BY 
    r.res_id

我认为编写php PDO对你来说并不重要，伙计们，我的问题只与这个sql有关。这个sql工作得很好，我只是想添加额外的功能。因此，请查看此列：r.status_id IN (1,2,3,4,5)

我已经Order BY r.res_id

了

我的问题：我想为每个status_id

使用多个ORDER

如何订购：

ORDER BY r.res_id DESC WHERE r.status_id IN (1,2)

和

ORDER BY r.res_id WHERE r.status_id IN (3,4,5)

在这个sql？

Answer 1

ORDER BY IF(r.status_id IN (1,2), r.res_id, NULL) DESC, r.res_id

使用此ORDER BY子句排序的记录集将首先显示所有带有r.status_id IN (1,2)的记录（因为NULL值按递减顺序排在最后），它们自己按{{1}的降序排序}};其次是按r.res_id按升序排序的所有其他值。

Answer 2

你可以使用联合语法：

SELECT * FROM ((SELECT
    r.*,
    s.uzunluq,
    b.id,
    au.status_id as aksessuar_status,
    au.aksessuar_id,
    au.aksessuar,
    1 as query_order
FROM
    seksiya s,
    result r
LEFT JOIN bosh_seksiya_aksessuar b
    ON
    b.bosh_seksiya = r.model AND
    b.ERK = :ses
LEFT JOIN aksessuar_up au
    ON au.model_id = r.res_id AND
    au.user_id = :user_id AND
    au.status_id = 9
WHERE 
    r.user_id = :user_id AND
    r.model=s.seksiya AND 
    s.erk = :ses AND
    r.status_id IN (1,2)
ORDER BY 
    r.res_id DESC) as table1
UNION
(SELECT
    r.*,
    s.uzunluq,
    b.id,
    au.status_id as aksessuar_status,
    au.aksessuar_id,
    au.aksessuar,
    0 as query_order
FROM
    seksiya s,
    result r
LEFT JOIN bosh_seksiya_aksessuar b
    ON
    b.bosh_seksiya = r.model AND
    b.ERK = :ses
LEFT JOIN aksessuar_up au
    ON au.model_id = r.res_id AND
    au.user_id = :user_id AND
    au.status_id = 9
WHERE 
    r.user_id = :user_id AND
    r.model=s.seksiya AND 
    s.erk = :ses AND
    r.status_id IN (3,4,5)
ORDER BY 
    r.res_id) as table2) sa table3 ORDER BY query_order

mysql按多个条件排序

2 个答案: