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我的整个查询与此子查询不同:

"(SELECT a.NumSeats From Aircrafts a WHERE f.AircraftID =a.AircrafID)"

我希望它返回一个数字,例如 5

当我选择一个整数 a.NumSeats 时,我不明白为什么这不起作用。

此查询还将返回 1 行的 MAX。

$subQuery1 = "(SELECT COUNT(*) from Seats s WHERE s.FlightID = f.FlightID)";
    $subQuery2 = "(SELECT a.NumSeats From Aircrafts a WHERE f.AircraftID =a.AircrafID)";
    $subQuery2 = 0;
    $query = mysql_query("SELECT * FROM Flights f WHERE f.DeptAirport = '".$dep."' AND f.ArrAirport = '".$arr.
            "' AND f.Date=STR_TO_DATE('".$depDate."', '%Y-%m-%d') AND ".$subQuery1. "=" .$subQuery2);

如果我删除 $subQuery2 = 0 它会中断

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1 回答 1

1

我认为a.AircrafID应该是a.AircraftID

于 2013-04-16T16:47:58.850 回答