php - 更新命令语法

Question

除了 UPDATE 命令之外，这里的一切都正常... INSERT 工作正常，但可惜，我被卡住了。

$queryLastDateArray = "SELECT date FROM schedule ORDER BY ID DESC LIMIT 1";
$lastDateArray = mysql_query($queryLastDateArray);
while($row = mysql_fetch_array($lastDateArray))
                        {
                        $lastDate = $row['date'];
                        }                       
$lastDatePlusOne = date("Y-m-d", strtotime("+1 day", strtotime($lastDate)));

$newDatesArray = GetDays($lastDatePlusOne, $_POST[date]);
$i = 0;
while($i < count($newDatesArray))
        {
        if ((date('D', strtotime($newDatesArray[$i]))) == 'Fri')
                {
                $insDate = "INSERT INTO schedule (date) VALUES ('$newDatesArray[$i]')";
                $result = mysql_query($insDate);
                $insEmp = "UPDATE schedule SET schedule.jakes = schedule_default.jakes FROM schedule, schedule_default WHERE schedule.date = '$newDatesArray[$i]' AND schedule_default.ID = '5'";
                $result2 = mysql_query($insEmp);
                }
        $i++;
        }

Answer 1

尝试像这样编写更新:

 "UPDATE schedule SET schedule.jakes = (SELECT schedule_default.jakes FROM  schedule_default WHERE schedule.date = '$newDatesArray[$i]' AND schedule_default.ID = '5')";