Question

我有升序的选择查询，如...

select DISTINCT
    (m.task_name) as TaskName, 
    m.activity_name as ActivityName,
    m.actual_score,
    m.score,
    m.section_name 
from 
    users u, 
    som_scores m 
where 
    m.ref_student_id = '".$row['userid']."' and 
    m.section_name IN('jws1','jws2','jws3','jws4','sm1','srs1','Pws1','Pws2','lws1','sp1') 
ORDER BY 
    m.section_name ASC

我想按升序设置Section名称，并按Task1 Task2等顺序创建任务名称顺序。

表示我想显示

等数据

1）部分名称= jws1和类似任务的部分 Task1 Task2 Task3 Task4

2）部分名称= jws2以及类似任务的部分 Task1 Task2 Task3 Task4

等等..

Answer 1

只需在ORDER BY

中添加二级订单即可

ORDER BY 
    section_name ASC,
    TaskName ASC

Answer 2

使用此查询

select DISTINCT(m.task_name) as TaskName, m.activity_name as ActivityName,m.actual_score,m.score,m.section_name from users u, som_scores m where m.ref_student_id = '".$row['userid']."' and m.section_name IN('jws1','jws2','jws3','jws4','sm1','srs1','Pws1','Pws2','lws1','sp1') ORDER BY m.section_name ASC,m.task_name ASC

这将首先按部分排序，然后按任务名称

排序

尝试此订单

m.task_name+0 ASC

OR

ORDER BY m.section_name ASC,CAST(SUBSTRING(m.task_name,LOCATE(' ',m.task_name)+1) AS SIGNED) ASC

Answer 3

我找到了这样的解决方案“cast( SUBSTRING(TaskName, 5 ) AS unsigned ) ASC”

select DISTINCT
        (m.task_name) as TaskName, 
        m.activity_name as ActivityName,
        m.actual_score,
        m.score,
        m.section_name 
    from 
        users u, 
        som_scores m 
    where 
        m.ref_student_id = '".$row['userid']."' and 
        m.section_name IN('jws1','jws2','jws3','jws4','sm1','srs1','Pws1','Pws2','lws1','sp1') 
    ORDER BY 
        m.section_name ASC,
        cast( SUBSTRING(TaskName, 5 ) AS unsigned ) ASC,
        ActivityName ASC

如何在php中升序

3 个答案: