查看可用日期的房间

Question

我有一个开始日期和结束日期。

$s="YYYY-MM-DD"; 
$e="YYYY-MM-DD"; 

我需要做一个查询，检查该跨度的可用房间。

cObjects , cBookings_details 
cObjects_id = cBookings_details_cObjects_id 

我真的被困在这里，真的很感谢一些帮助。

我当前的查询

SELECT cObjects.* 
FROM cObjects LEFT JOIN cBookings_details ON cObjects.cObjects_id = cBookings_details.cBookings_details_cObjects_id 
WHERE cBookings_details.cBookings_details_arrival NOT BETWEEN '".$s."' AND '".$e."' 
AND cBookings_details.cBookings_details_departure NOT BETWEEN '".$s."' AND '".$e."' 
AND cBookings_details.cBookings_details_arrival <> '".$s."' AND cBookings_details_departure <> '".$s."' 
AND cBookings_details.cBookings_details_arrival <> '".$e."' AND cBookings_details_departure <> '".$e."' 
AND cObjects.cObjects_type < '2' 

OR cBookings_details.cBookings_details_id is null AND cObjects_type < '2' 

Answer 1

这是一个常见的问题..实际上只是写了一个指南，了解此工作：

Selecting rows with start and end dates that feature in a chosen interval 
------------------------------------------------------------------------- 

Chosen Interval - :start_date (S) 
        :end_date  (E) 

Rows   - row.start_date (s) 
        row.end_date (e) 

Increasing date--> 

     S  E 
     |  |   Chosen Interval 

1.  s---e     Rows we want 
2.  s---e     . 
3.   s---e    . 
4.  s----------e    . 

5. s--e      Rows we don't want 
6.    s--e    . 

LOGIC: 
row.end_date >= :start_date AND row.start_date <= :end_date 

如果您正在寻找可用客房，LEFT JOIN房间使用上述逻辑的预订和SELECT行的预订为NULL。

适用于您的架构，我相信这会出来为：

SELECT o.* 
    FROM cObjects o 
LEFT JOIN cBookings_details bd 
     ON bd.cBookings_details_cObjects_id = o.cObjects_id 
     AND bd.cBookings_details_arrival <= :end_date 
     AND bd.cBookings_details_departure >= :start_date 
    WHERE bd.cBookings_details_id IS NULL 
    (AND o.cObjects_type < '2') # Double check this is what you want 

顺便说一句，如果我有你的模式来工作，我会哭泣。为什么要重复列中的表名？它只是增加了噪音。