Question

我正在尝试使用以下详细信息编写一个mysql查询 -

我有三张桌子

1）预订表，其中包含列booking_id，journey_start_datetime，journey_end_datetime。

2）驱动程序表，列驱动程序为driver_id，driver_name。

3）Driver_Assign表，其中包含列booking_id，driver_id，busy_start_datetime，busy_end_datetime。

当我向司机分配预订时，新条目会转到Driver_Assign表格，其中包含booking_id，journey_start_datetime，journey_end_datetime的详细信息。

我希望得到所有在一段时间内都不忙的车手名字。即

让一个预订分配给司机＆＃34; John＆＃34; for journey_start_datetime-＆gt;＆＃39; 2014-06-27 12：00：00＆＃39;和journey_end_datetime-＆gt;＆＃39; 2014-06-27 14：00：00＆＃39;。

现在进行新预订（journey_start_datetime-＆gt;＆＃39; 2014-06-27 13:00:00＆＃39;和journey_end_datetime-＆gt;＆＃39; 2014-06-27 15:00:00＆＃39 ;）司机约翰不会来。

将OP的代码从评论转移到问题 -

SELECT U.driver_name 
FROM driver AS U 
where U.id not in 
 (select driver_id 
  from driver_assign as DVA 
  WHERE ('2014-06-27 13:00:00'>= DVA.busy_start_datetime OR 
         '2014-06-27 13:00:00'<= DVA.busy_end_datetime
        ) AND 
        ('2014-06-27 15:00:00'>= DVA.busy_start_datetime OR 
         '2014-06-27 15:00:00'=< DVA.busy_end_datetime
        )
 )

Answer 1

SELECT d.driver_name 
FROM driver d 
     LEFT JOIN driver_assign da ON da.driver_id=d.driver_id
WHERE
     da.busy_start_datetime <='2014-06-27 13:00:00'
    AND da.busy_end_datetime>='2014-06-27 13:00:00'
HAVING da.driver_id is null

您只需要LEFT JOIN并排除非空（忙）的行

Answer 2

SELECT d.driver_name 
FROM driver d
WHERE d.driver_id not in
(SELECT driver_id from driver_assign  
    WHERE
(busy_start_datetime >= '2014-06-27 13:00:00' AND NOT busy_start_datetime >= '2014-06-27 15:00:00')  
    OR
(busy_end_datetime > '2014-06-27 13:00:00' AND NOT busy_end_datetime > '2014-06-27 15:00:00'
)
OR (busy_start_datetime < '2014-06-27 13:00:00' AND busy_end_datetime > '2014-06-27 15:00:00')
)

Sql查询特定时间段

2 个答案: