我正在处理从表中检索的数据
<?php
$result=$mysqli->query("SELECT value1, value2 FROM table1");
while($row=$result->fetch_assoc())
{
$value1 = $row['valu1'];
$value2 = $row['value2'];
$mysqli->query("INSERT IGNORE INTO table2 (value1) VALUES ('$value1')");
$result2 = $mysqli->query("SELECT id FROM table2 WHERE value1='$value1'");
$row2 = $result2->fetch_assoc();
$column1_id = $row2['id'];
$result2->close();
$mysqli->query("INSERT IGNORE INTO table3 (value2) VALUES ('$value2')");
$result3 = $mysqli->query("SELECT id FROM table3 WHERE value1='$value2'");
$row3 = $result3->fetch_assoc();
$column2_id = $row3['id'];
$result3->close();
$mysqli->query("INSERT INTO table4 (value1,value2) VALUES ('$value1','$value2')");
}
?>
问题是,子$result
将与父项混淆,而while循环只能在第一个循环中运行。
答案 0 :(得分:0)
更好的应该是这样的
insert ignore into table2 (value1) select value1 from table1;
insert ignore into table3 (value2) select value2 from table1;
insert ignore into table4 (value1, value2) select value1, value2 from table1
这是优化的,我认为你需要SELECT id ..和loop
(我看到你在你的例子中使用了结果)