Mysql 带有语法错误的PHP更新查询

有人能告诉我为什么这不起作用，并返回语法错误吗

$sql4 = "update apiStreetCheckGeneral 
         set (BBAverageSpeed, BBSuperFastBBAvailable, BBCommentary)
             values ('$averagespeed', '$superfast', '$bbcommentary') 
         where PostCode='".$values['PostCode']."'";
CustomQuery($sql4);

这是您的查询：

update apiStreetCheckGeneral set (BBAverageSpeed, BBSuperFastBBAvailable, BBCommentary)
     values ('$averagespeed', '$superfast', '$bbcommentary')
     where PostCode='".$values['PostCode'].

我不知道使用列列表或值的

update

语法。分别设置每个：

update apiStreetCheckGeneral
     set BBAverageSpeed = '$averagespeed',
         BBSuperFastBBAvailable = '$superfast',
         BBCommentary = '$bbcommentary'
     where PostCode='".$values['PostCode']."'"

但是，您应该学习使用参数化查询，尤其是

update

语句。

使用如下查询

$sql4 = "update apiStreetCheckGeneral 
         set BBAverageSpeed = '$averagespeed', 
          BBSuperFastBBAvailable = '$superfast', 
          BBCommentary = '$bbcommentary'
          where PostCode='".$values['PostCode']."' ";
CustomQuery($sql4);

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语法错误告诉您什么？请逐个设置，MySQL中不接受其他方式