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我的计划是从外部更新/插入现有的/新的记录到数据库中,我有信息设置进入数据库,但不能检查是否它已经存在。PHP和MYSQL这是MySQL的语法正确的更新/插入如果存在
我第一次尝试在做数据库的东西
$link = resdb::connect();
$q = "IF (EXISTS (SELECT * FROM property AS this WHERE this.name = $propertyname))"
."begin"
// UPDATE PROPERTY IF IT EXISTS
."UPDATE property (name, propertylocation, propertyrating, propertytype)"
."SET ($propertyname, $locationid, $ratingid, $typeid)"
."WHERE name = $propertyname"
."end"
."ELSE"
."begin"
."INSERT INTO property (name, propertylocation, propertyrating, propertytype)"
."VALUES ($propertyname, $locationid, $ratingid, $typeid)"
."end";
$r = mysqli_query($link, $q);
if($r > 0){
return true;
}
唯一ID为每一行的帮助完成。
比TSQL方法容易得多。 upvote并回答。谢谢 – goingsideways 2011-02-10 05:35:50