php - 是否可以在一个 while() 中组合多个 MySQL 查询？

Question

while ($row1=mysql_fetch_array($sql1); $row2=mysql_fetch_array($sql2))

{
    echo $row1['line'];
    echo $row1['style_no'] ;
    echo $row2['line'];
    echo $row2['style_no'] ;

}

Answer 1

将它们与and

while ($row1 = mysql_fetch_assoc($sql1) and $row2 = mysql_fetch_assoc($sql2)) {
    ...
}

但是最好将两个查询组合成一个JOIN.

Answer 2

你可以这样做：

while ($row1=mysql_fetch_array($sql1) && $row2=mysql_fetch_array($sql2)) {
    echo $row1['line'];
    echo $row1['style_no'] ;
    echo $row2['line'];
    echo $row2['style_no'] ;
}