Question

我想获取最后的记录，但显示为升序而不是降序。

 SELECT R.cr_id, 
        R.time, 
        R.reply, 
        U.id, 
        U.username,
        U.firstname, 
        U.lastname, 
        U.email, 
        U.image 
     FROM (HM_customers U, HM_conversation_reply R) 
     WHERE R.user_id_fk = U.id AND R.c_id_fk = '1' 
     ORDER BY R.cr_id DESC LIMIT 20

编辑...

我正在使用两张桌子。

Answer 1

试试这个

SELECT R.cr_id,  
    R.time,  
    R.reply,  
    U.id,  
    U.username, 
    U.firstname,  
    U.lastname,  
    U.email,  
    U.image  
 FROM HM_customers U, HM_conversation_reply R  
 ON R.user_id_fk = U.id   
 WHERE R.c_id_fk = '1'  
 GROUP BY R.cr_id
 ORDER BY R.cr_id DESC LIMIT 20

Answer 2

以下代码为我工作。

   SELECT t.cr_id, 
    t.time, 
    t.reply, 
    t.id, 
    t.username,
    t.firstname, 
    t.lastname, 
    t.email, 
    t.image 
 FROM (
 SELECT R.cr_id, 
    R.time, 
    R.reply, 
    U.id, 
    U.username,
    U.firstname, 
    U.lastname, 
    U.email, 
    U.image 
 FROM (HM_customers U, HM_conversation_reply R) 
 WHERE R.user_id_fk = U.id AND R.c_id_fk = '1' 
 ORDER BY R.cr_id DESC
 limit 20
 ) t
 ORDER BY t.cr_id ASC

Answer 3

 SELECT R.cr_id, 
        R.time, 
        R.reply, 
        U.id, 
        U.username,
        U.firstname, 
        U.lastname, 
        U.email, 
        U.image 
     FROM HM_customers U join HM_conversation_reply R
     WHERE R.user_id_fk = U.id AND R.c_id_fk = '1' 
     ORDER BY R.cr_id DESC LIMIT 20

Answer 4

更改

ORDER BY R.cr_id DESC LIMIT 20

到

ORDER BY R.cr_id ASC LIMIT 20

获取降序但在mysql中显示为升序

4 个答案: