我有这个sql查询:
$sql = "SELECT d.doctor_name, a.patient_name, s.date, s.time FROM appointments AS a LEFT JOIN doctors AS d ON d.id = a.doctor_id LEFT JOIN slots AS s ON s.id = a.slot_id WHERE s.date > '2019-10-01' ORDER BY d.doctor_name DESC ";
$result = $mysqli->query($sql);
echo '<pre>';
while ( $row = $result->fetch_assoc() ) {
print_r($row);
}
echo '</pre>';
它的输出是:
Array
(
[doctor_name] => Khaled
[patient_name] => Nawaz
[date] => 2019-10-11
[time] => 02:01
)
Array
(
[doctor_name] => Khaled
[patient_name] => Anik
[date] => 2019-10-07
[time] => 02:31
)
Array
(
[doctor_name] => Khaled
[patient_name] => Manik
[date] => 2019-10-02
[time] => 03:31
)
我可以将date
和time
列合并为slot_date_time吗?
所以输出将是例如:
Array
(
[doctor_name] => Khaled
[patient_name] => Manik
[slot_date_time] => 2019-10-02 03:31
)
尝试此查询
SELECT d.doctor_name, a.patient_name, CONCAT(s.date, ',', s.time) AS slot_date_time
FROM appointments AS a LEFT JOIN doctors AS d
ON d.id = a.doctor_id LEFT JOIN slots AS s
ON s.id = a.slot_id
WHERE s.date > '2019-10-01'
ORDER BY d.doctor_name DESC
使用CONCAT
将两列合并为一列