php - 如何在 MySQL 的左外连接中有序显示类别

Question

我怎样才能显示这个查询，由 qi​​d 排序？

  $newcount=$db->get_results("
        SELECT  s2.qcategory, 
                s1.id, 
                count(s1.na) as na_count 
        FROM    (
                    select  distinct `qcategory` 
                    from    store 
                    where   survey_name='$userID' and 
                            dateone='$dateVal' and 
                            branch='$branch'
                ) s2 
                left join store s1 
                    on s1.`qcategory` = s2.`qcategory` and 
                        s1.`na` = '1' 
        group by 1 
        order by s1.qid");

Answer 1

你可能想订购 ASC 或 DESC

试试这个

     ORDER BY s1.qid  ASC   

或者

   ORDER BY s1.qid  DESC

为什么你做GROUP BY 1？

Answer 2

由于数据类型是VARCHAR您需要将其转换为数字，例如

ORDER BY CAST(s1.qid AS SIGNED) ASC

• SQLFiddle 演示