麻煩在mysql中查詢php？

Question

$sql = "SELECT s1.roomtype, s1.roomno, s1.checkin,s1.checkout FROM
guestrocordtransac s1
JOIN guestrocord s2
ON s1.roomtype = s2.roomtype  AND s1.roomno != s2.roomno 
WHERE s1.checkin = '".$date1."' BETWEEN  s2.checkin  = '".$date1."' AND s2.checkout='".$date2."' "; 

我不知道哪里出了問題..我必須檢查房間類型，房間號，以及入住和退房日期之間以及...

我從表格中獲取roomttype，roomno，checkin，checkout值。現在，我必須將其與數據庫進行比較。

Answer 1

這里

$sql = "SELECT s1.roomtype, s1.roomno, s1.checkin,s1.checkout FROM
guestrocordtransac s1
JOIN guestrocord s2
ON s1.roomtype = s2.roomtype  AND s1.roomno != s2.roomno 
WHERE s1.checkin = '".$date1."' BETWEEN  s2.checkin  = '".$date1."' AND s2.checkout='".$date2."' ";

您的where子句中的語法無效，因為您不應該檢查操作數between相等between 。 這應該可以解決問題：

$sql = "SELECT s1.roomtype, s1.roomno, s1.checkin,s1.checkout FROM
guestrocordtransac s1
JOIN guestrocord s2
ON s1.roomtype = s2.roomtype  AND s1.roomno != s2.roomno 
WHERE s1.checkin = '".$date1."' BETWEEN  '".$date1."' AND '".$date2."' ";

between 這里閱讀更多有關。