-1 
SET TERMOUT ON

DROP VIEW BP_VIEW;  
CREATE VIEW BP_VIEW AS
SELECT b.BOOKINGID, 
       g.GUESTID,   
       g.FORENAME, g.SURNAME, 
       br.FLOORNO, br.ROOMNO, 
       r.TYPE, 
       b.TOTALPRICE + (rt.RATE*(b.DEPARTDATE - b.ARRIVEDATE)) AS TOTAL_AMOUNT_DUE
FROM   GUEST g, ROOM r
INNER JOIN BOOKING b ON b.BOOKINGID = GUESTID
INNER JOIN BOOKINGROOM br ON b.BOOKINGID = br.BOOKINGID AND r.FLOORNO = br.FLOORNO AND r.ROOMNO = br.ROOMNO
INNER JOIN ROOMTYPE rt ON rt.TYPE = r.TYPE
WHERE (CURRENT_DATE BETWEEN b.ARRIVEDATE AND b.DEPARTDATE);

SELECT * FROM BP_VIEW;

COMMIT;

SET TERMOUT ON

大家好，

我正在尝试执行上面的代码，它执行得很好，但它正在选择更新某些不属于 b.ARRIVEDATE 和 b.DEPARTDATE 之间的 CURRENT_DATE 类别的预订。

通过此声明，我试图查找当前而非过去预订的预订信息。

当代码执行时，结果不是我所期望的。我是否正确完成了 AND 部分？

4

2 回答 2

0

我建议在双方都添加一个 trunc() 以从日期中删除时间部分，除非您想比较日期和时间。此外，可以使用 BETWEEN 运算符并且更具可读性...T：

WHERE trunc(CURRENT_DATE) >= trunc(b.ARRIVEDATE) AND trunc(CURRENT_DATE) <= trunc(b.DEPARTDATE)
于 2013-03-22T12:24:53.567 回答
0

Oracle 的日期数据类型包括时间。这意味着：

where datefield between date1 and date2

通常会错过 date2 发生的记录。这个更好：

where datefield >= date1
and datefield < date2
于 2013-03-22T11:56:19.417 回答