我有这两个查询,我想将它们合并在一起,以便用户根据第二个查询过滤第一个查询
第一个查询:
SELECT t1 . *
FROM car t1
left outer JOIN rent ON t1.carId = rent.carId
WHERE NOT
EXISTS (
SELECT NULL
FROM rent t2
WHERE t1.carId = t2.carId
)
OR not (
rent.startdate > '$to'
OR rent.enddate < '$from'
)
第二个查询:
SELECT carId,model,fuelconsumption,type,picture,color,price,region FROM car WHERE model ='$m' OR type='$t' OR price='$p' OR color = '$c' ORDER BY model,type,price,color DESC
这两个查询分别给出正确的答案
最佳答案
我不确定要了解您的请求,但是如果您想合并两个查询,则应该这样做:
select t1.*
from car t1
left outer join rent on t1.carId = rent.carId
where
(
not exists
(
select null
from rent t2
where t1.carId = t2.carId
)
or not
(
rent.startdate > '$to'
or rent.enddate < '$from'
)
)
and
(
model ='$m'
OR type='$t'
OR price='$p'
OR color = '$c'
)
order by model,type,price,color desc
关于php - 如何从嵌套联接查询中选择,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/23948194/