我有一个 PHP Laravel 的查询:
$sensor_data = DB::table('devices_sensor_data as D')
->select(DB::raw('
D.id,
COALESCE(D.DeviceId,dx.DeviceId) AS DeviceId,
D.ENERGY_Total,
D.Time')
)
->join(DB::raw('
(SELECT
MIN(CONVERT_TZ(Time, "'.$dbTz.'", "'.$usrTz.'")) min_time,
MAX(CONVERT_TZ(Time, "'.$dbTz.'", "'.$usrTz.'")) max_time,
DeviceId
FROM devices_sensor_data
WHERE DATE(Time) BETWEEN "'.$fromTzTime.'" AND "'.$toTzTime.'"
AND DeviceId IN (\''.$arrayDeviceID.'\')
GROUP BY DATE(Time), DeviceId ORDER BY DATE(Time)
) AS dx'
),
function($join)
{
$join->on(DB::raw('D.Time = `dx`.`min_time` OR D.Time'), '=', 'dx.max_time');
$join->where('D.DeviceId', '=', DB::raw('dx.DeviceId'));
})
->whereIn('D.DeviceId', array_keys($devicesArr))
->whereDate('D.Time', '>=', $fromTzTime)
->whereDate('D.Time', '<=', $toTzTime);
$sensor_data = $sensor_data
->orderBy('D.DeviceId')
->orderBy('D.Time')
->get();
我希望根据不同的用户所在时区选择MIN
和MAX
,而不是默认值,目前的默认值是Asia/Kolkata,因此我想根据例如America/New_York来选择它。
它按照IST时区返回给我最小值和最大值,只需将其转换为纽约时间即可,但我想根据纽约时区获取最小值和最大值。
CONVERT_TZ(datestamp,'Asia / Kolkata','Asia / Dhaka')
来转换您的时间。或者是CONVERT_TZ(datestamp,'Asia / Kolkata','Europe / London')
? - O. JonesDATETIME
或TIMESTAMP
?客户端的系统时间设置为正确的时区了吗? - Rick James