SQL SELECT犯規得出的結果，但該表不是空

Question

我有這樣的SQL SELECT：

$sql = "SELECT 
    datum, 
    COUNT(rendeles_id) AS ennyi 
FROM 
    rendeles_adatok 
WHERE 
    datum >= $date_start AND(
    datum <= $date_end AND STATUS = $ rendeles_allapot 
) 
GROUP BY 
    datum 
ORDER BY 
    datum ASC"; 

當我打印出來的SQL的樣子：

SELECT 
    datum, 
    COUNT(rendeles_id) AS ennyi 
FROM 
    rendeles_adatok 
WHERE 
    datum >= 2017 -09 -01 AND(
    datum <= 2017 -09 -30 AND STATUS = 0 
) 
GROUP BY 
    datum 
ORDER BY 
    datum ASC 

的問題是，我沒有得到任何結果。如果我在2017-09-01開始日期輸入，2017-09-30輸入結束日期，則不會給任何東西。

我在這張照片上向你展示，我的桌子不是空的。基準字段是日期類型。

Answer 1

$sql = "ELECT datum, 
     Count(rendeles_id) AS ennyi 
FROM rendeles_adatok 
WHERE datum >= '$date_start' 
AND ( 
       datum <= '$date_end' 
     AND status = '$rendeles_allapot)      
GROUP BY datum ORDER BY datum ASC";