有没有一种方法可以随机选择一个ID进入数据库

Question

我正在填写汽车经销商预订表格，我需要随机选择一名工作人员进行试驾

我尝试过mt_rand（），但是我想我把它放错了位置

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$sql = "INSERT INTO bookingcars (BookingStart, BookingEnd, BookingDate, MemberReference, ActivityID staffID) VALUES ('$timeStart', '$timeEnd', '$startDate', '$memberReference', '$activity', '$mt_rand(1, 4)staffID'";
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Answer 1

虽然您可以在查询中构建它，但是如果执行以下操作，它会更干净，更易于调试：

$staff=rand(1,4).'staffID'; // assume you wanted 1staffID .. ?

//or did you just want $staff=rand(1,4);

$sql = "INSERT INTO bookingcars (BookingStart, BookingEnd, BookingDate, MemberReference, ActivityID, staffID) VALUES ('$timeStart', '$timeEnd', '$startDate', '$memberReference', '$activity', '$staff')";

Answer 2

另一种方式是在您的查询值中添加一个,...) VALUES (..., (SELECT DISTINCT (Id) FROM stalesstafftable order by Rand() limit 1))

之类的子查询。