PHP 数据库三个表关联 有三个表分别为a,b,c, a表字段为：userid username,b表字段为：wbid userid content

PHP 数据库三个表关联 有三个表分别为a,b,c, a表字段为：userid username,b表字段为：wbid userid content

$query = mysql_query("SELECt a.*,b.wbid,b.content, c.potoid,c.upimg FROM a LEFT JOIN b ON a.userid=b.userid LEFT JOIN c ON a.userid=c.userid");
while($rt = mysql_fetch_array($query)) {
print_r($rt);
}

SELECt A.username,B.content,C.ipimg from A as A,B as B,C as C where A.userid="$userid" and B.userid="$userid" and C.userid="$userid"
phh循环吧后面的

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