Question

我有两个表TableA和TableB，其中包含列id，login，pass。我还有一个php数组：$array = [1,3,5]。如何将行从TableA传输到TableB，其中id等于我的数组的每个值？ id是自动增量的，必须是唯一的。在我看来，它看起来像这样：

INSERT INTO TableB (`login`, `pass`) 
SELECT `login`, `pass` FROM TableA WHERE `id` = $array[0] 
AND `id` = $array[1] AND `id` = $array[2];

但它不起作用

是否有机会使用WHILE进行循环？

Answer 1

您可以使用如下语句：

$ids = [1,3,5];
$query = "INSERT INTO `TableB` (`login`, `pass`) SELECT `login`,`pass` FROM `TableA` WHERE `id` IN (".implode(",", $ids).");";

虽然：您应该为此使用预准备语句和参数，但这个答案只是为了显示语法。

Answer 2

很容易让你说你正在使用mysqli：

$query= "SELECT * FROM TableA limit 3";
//takes first 3 rows from TableA
//$con being the connection string in config file
$result = mysqli_query($con,$query);
while($row = mysqli_fetch_array($result)){
//takes each row by row
$username = $row['username'];
$password = $row['password'];
//now that we initiated variables the sql query
$query1 = "INSERT INTO TableB (username, password) VALUES ('$username', '$password');
mysqli_query($con,$query1);
}

希望这有帮助

编辑：我刚刚读到它应该有一个数组，所以你应该改变你的查询：

for($i=0; $i<count(array), $i++){

$query= "SELECT * FROM TableA WHERE ID = '$array[i]'";

//$con being the connection string in config file
$result = mysqli_query($con,$query);
while($row = mysqli_fetch_array($result){
//takes each row by row
$username = $row['username'];
$password = $row['password'];
//now that we initiated variables the sql query
$query1 = "INSERT INTO TableB (username, password) VALUES ('$username', '$password');
mysqli_query($con,$query1);
}
}

如何将多个行从一个表传输到另一个表（SQL）

2 个答案: