我不是一个优秀的php程序员(我来自C++)。我仅将php用于数据库输入。我有一个包含以下内容的数据库:UserId(anuniqueint)AsyncPointsAverage(float)AsyncPointsAverageRank(apositionbasedonthevalueimmediatelyabove)AsyncPointsRecentAverage(floatanaverageforthelast5testsonly)AsyncPointsRecentAverageRank(apositionbasedonthevalueimmediatelyabove)该表中大约有