MySQL删除SELECT结果

Question

我有一个SELECT，它按预期提供结果集：

  SELECT iper.ip, trafikk.port, COUNT(trafikk.port) as Antall FROM trafikk 
    Inner JOIN iper ON iper.id = trafikk.FK_ID 
    Group by IPer.IP 
    having Antall=4 and trafikk.port=445

结果示例： http://tore.aasli.net/sql/Delete.jpg

现在，如果我想删除这些SELECT行，那么最好的方法是什么？

Answer 1

DELETE FROM iper 
WHERE iper.ip IN(
    SELECT iper.ip 
    FROM trafikk
    WHERE iper.id = trafikk.FK_ID AND trafikk.port=445
    Group by iper.ip 
    having COUNT(trafikk.port)=4
)