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mysql - 按每张表相同字段排序2张表，mysql，经典asp

问题描述

我正在尝试从 2 个表中订购数据以显示在一个列表中，这也基于第三个表中的 id。

表 3 包含其他 2 个表的 ID。

e_allocation table
------------------
eid, sid, iid

5, 1234, NULL

5, NULL, 1234

表 1 和表 2 是类似数据的表。

i_status table
--------------
iid, status

1234, Complete

1235, Complete

1236, Not Complete

s_status table
--------------
sid, status

1234, Complete

1235, Not Complete

1237, Not Complete

objCon.Execute ("SELECT a.sid, a.iid, b.status AS istats, c.status AS sstats
FROM e_allocation a LEFT JOIN i_status b ON a.iid=b.iid LEFT JOIN s_status c
ON a.sid=c.sid WHERE a.eid = '5' ORDER BY b.status Desc, c.status Desc")

所以目前我可以从数据库中获取数据，但它显然先订购表 b，然后再订购 c。我需要这些订购的加入。

目前返回(Table=I or S, Record ID=1234, Status = Complete or Not Complete)：

I:1234:Complete

I:1235:Complete

I:1236:Not complete

S:1234:Complete

S:1235:Not Complete

S:1237:Not Complete

我试图得到：

I:1234:Complete

S:1234:Complete

I:1235:Complete

S:1235:Not Complete

I:1236:Not complete

S:1237:Not Complete

while not objDb.EOF
    sid = objDb("id")
    iid = objDb("iid")
    if sid <>"" then datlst = datlst &"S:"& sid &":"&objDb("sstats")&",<BR>"
    if iid <>"" then datlst = datlst &"I:"& iid &":"&objDb("istats")&",<BR>"
    objDb.MoveNext
Wend
response.write datlst

任何指向正确方向的指针都非常感谢？谢谢

标签： mysqlasp-classic

解决方案

这是我的尝试。

create table e_allocation (eid int, sid int, iid int);
insert into e_allocation select 5, 1234, NULL;
insert into e_allocation select 5, NULL, 1234;
insert into e_allocation select 5, 1235, NULL;
insert into e_allocation select 5, NULL, 1235;
insert into e_allocation select 5, 1236, NULL;
insert into e_allocation select 5, NULL, 1236;

create table i_status (iid int, status varchar(25));
insert into i_status select 1234, 'Complete';
insert into i_status select 1235, 'Complete';
insert into i_status select 1236, 'Not Complete';

create table s_status (sid int, status varchar(25));
insert into s_status select 1234, 'Complete';
insert into s_status select 1235, 'Not Complete';
insert into s_status select 1237, 'Not Complete';

SELECT
  case when a.sid is null then 'I' else 'S' end as iors,
  ifnull(a.sid,a.iid) as id,
  ifnull(b.status,c.status) as status
FROM e_allocation a LEFT JOIN i_status b ON a.iid=b.iid LEFT JOIN s_status c
ON a.sid=c.sid
WHERE a.eid = '5' and (b.status is not null or c.status is not null)
ORDER BY id, iors

下次请务必提供 CREATE TABLE 等语句，这样我们就不必输入它们了。

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