我有一个非常复杂的查询,我用来从数据库中提取一些结果(数据库设计很脏)。
基本上我最终的结果是按两个标准排序:
t.property
l.unit_number
基本上我希望将所有类似的t.property
分组,然后l.unit_number
根据我预先存在的内容进行排序。
这是我的问题:
SELECT t.name_first,
t.name_middle,
t.name_last,
t.tenant_id,
t.property,
l.unit_number
FROM tenants t
INNER JOIN (
SELECT tenant_id, property, unit_number,
max(lease_start_date) AS newest_start_date
FROM leases
GROUP BY property, unit_number
) x
ON t.tenant_id = x.tenant_id
INNER JOIN leases l
ON l.lease_start_date = x.newest_start_date
AND l.tenant_id = t.tenant_id
WHERE t.name_first != 'Pending'
AND l.termination_date IS NULL
ORDER BY l.unit_number REGEXP '^[A-Za-z]+$'
,CAST(l.unit_number as SIGNED INTEGER)
,CAST(REPLACE(l.unit_number,'-','')AS SIGNED INTEGER)
,l.unit_number
,t.property
目前我的数据是根据l.unit_number
条件进行适当排序,而不是t.property
,即:
t.property l.unit_number
4321 Test 1
1234 Test 2
5555 Test 3
4321 Test 4
1234 Test 7320-1
4321 Test 7320-2
5555 Test 7320-3
5555 Test 7320-4
1234 Test A
4321 Test B
4321 Test C
5555 Test D
理想情况下,我希望输出按t.property
分组,然后按l.unit_number
排序。即:
t.property l.unit_number
1234 Test 2
1234 Test 7320-1
1234 Test A
4321 Test 1
4321 Test 4
4321 Test 7320-2
4321 Test B
5555 Test 3
5555 Test 7320-3
5555 Test 7320-4
5555 Test D
答案 0 :(得分:2)
将t.property放在ORDER BY
:
ORDER BY t.property
,l.unit_number REGEXP '^[A-Za-z]+$'
,CAST(l.unit_number as SIGNED INTEGER)
,CAST(REPLACE(l.unit_number,'-','')AS SIGNED INTEGER)
,l.unit_number
答案 1 :(得分:0)
这比这更复杂吗?
ORDER BY t.property
,l.unit_number