php - 使用更改和自动递增 ID 复制数据库中的多行

Question

简而言之，我需要做的是:

1. 在表格中复制 X 行
2. 修改几个字段
3. 保持自动递增 ID 的顺序。

这就是我目前所做的。

$this->db->query("CREATE TEMPORARY TABLE tmpTbl AS SELECT * FROM orders_products WHERE op_order_id = $id");
$temp = $this->getAll('tmpTbl');

## grab the highest id in the orders_products table so we can begin auto_inc after that
$this->db->select_max("op_id");
$max = $this->getAll('orders_products');
## set the id to a counter for the loop
$counter = $max[0]->op_id;

## loop through the results editing fields as needed
foreach ( $temp as $t ) :
  $counter++;
  $this->db->query("UPDATE tmpTbl SET op_id = $counter, op_order_id = $orderId WHERE op_order_id = $id");
endforeach;
$temp = $this->getAll('tmpTbl');

## insert the new duplications into the orders_products table
$this->db->query("INSERT INTO orders_products SELECT * FROM tmpTbl");

## drop the temp table so it is fresh and clean for the next duplication
$this->db->query("DROP TEMPORARY TABLE tmpTbl"); 

当我运行它时，我会到达这一行

$this->db->query("INSERT INTO orders_products SELECT * FROM tmpTbl");

它抛出这个错误

Duplicate entry '54' for key 'PRIMARY

INSERT INTO orders_products SELECT * FROM tmpTbl

我首先创建计数器的原因是为了解决这个问题。然而，可悲的是我错了。

Answer 1

对于您的情况，我会做的是删除 ID 列。来自 SELECT，以便 INSERT 将自动生成 ID。

INSERT INTO orders_products (column2,column3,etc)
    SELECT column2, column3, etc FROM tmpTbl