same query and different result sql/plus php

Question

I use oracle 11g and I don't know why my query return different result when I use SQL/PLUS and when I use PHP

<?php
$conn=oci_connect('system','3636','orcl'); 

$stid = oci_parse($conn,
"SELECT num_chb
 FROM chambre
 WHERE num_chb NOT IN
    (SELECT DISTINCT r.num_chb
     FROM chambre c,
          reservation r
     WHERE (TO_DATE('2015-12-13','YYYY-MM-DD') NOT BETWEEN r.dat_arriv AND r.dat_depart)
       AND (TO_DATE('2015-12-14','YYYY-MM-DD') NOT BETWEEN r.dat_arriv AND r.dat_depart)");


oci_execute($stid);
$tab=array();

while ($row = oci_fetch_assoc($stid)) {
   $tab[]=$row['NUM_CHB'];
}
print_r($tab);
}
?>

SQL PLUS AND PHP RESULT

Answer 1

I'm seeing different queries:

PHP:

SELECT num_chb
 FROM chambre
 WHERE num_chb NOT IN
    (SELECT DISTINCT r.num_chb
     FROM chambre c,
          reservation r
     WHERE (TO_DATE('2015-12-13','YYYY-MM-DD') NOT BETWEEN r.dat_arriv AND r.dat_depart)
       AND (TO_DATE('2015-12-14','YYYY-MM-DD') NOT BETWEEN r.dat_arriv AND r.dat_depart)

Oracle:

SELECT num_chb
 FROM chambre
 WHERE num_chb NOT IN
    (SELECT DISTINCT r.num_chb
     FROM chambre c,
          reservation r
     WHERE (TO_DATE('2015-12-13','YYYY-MM-DD') NOT BETWEEN r.dat_arriv AND r.dat_depart)
       AND (TO_DATE('2015-12-14','YYYY-MM-DD') NOT BETWEEN r.dat_arriv AND r.dat_depart)
     AND (r.dat_arriv TO_DATE('2015-12-13','YYYY-MM-DD') NOT BETWEEN AND TO_DATE('2015-12-14','YYYY-MM-DD'))
       AND (r.dat_depart NOT BETWEEN TO_DATE('2015-12-14','YYYY-MM-DD') TO_DATE('2015-12-14','YYYY-MM-DD'))

PD:I cannot comment.

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