Question

我有两张桌子

rental_detail - ＆gt; [id，Building，Floor，Flate_no，Name，doj]

rental_detail存储此人的信息这是rental_detail

|id|name|building|Floor|Flate_no|doj |1 |aana| C | 1st |c-101 |06-12-2015

并在

Monthly_rent - ＆gt; [id，Building，Floor，Flate_no，date]存储每月每月租金的详细信息

这是month_rent

|id|building|Floor|Flate_no|date |rent| |1 | C | 1st |c-101 |02-01-2016|2000 |2 | C | 1st |c-101 |03-02-2016|2000 |1 | C | 1st |c-101 |06-12-2015|2000

我需要Monthly_rent的最长日期以及rental_detail的人的所有信息，其中建筑物为c，楼层为1，flate为c-101

我尝试了此查询：

select *,max(mr.date) as m 
from monthly_rent mr 
Inner join rental_details rd 
   on rd.building='C' and rd.floor = '1st' And rd.flate_no='C-101

我需要这个

|1|aana|C|1st|c-101|03-02-2016|

aana在03-02-2016支付最后租金

Answer 1

试试这个：

SELECT rd .*,mr.date AS mr_date  
FROM rental_details rd 
LEFT JOIN monthly_rent mr 
ON rd.date = (SELECT MAX(date) FROM monthly_rent WHERE building='C' )
WHERE rd.building='C' AND rd.floor = '1st' AND rd.flate_no='C-101'

Answer 2

试试这个：

select *, max(mr.date) as m 
from monthly_rent mr, rental_details rd
where mr.id = rd.id 
and rd.building='C' 
and rd.floor = '1st' 
and rd.flate_no='C-101'

这应该有效....

Answer 3

尝试这样，它应该有帮助..

select rd.*,max(mr.date) as m 
from monthly_rent as mr 
LEFT join rental_details as rd ON mr.building = rd.building
WHERE rd.floor = '1st' and rd.flate_no='C-101'

如何在一个查询中从两个表中获取记录

3 个答案: