Question

简而言之，我需要做的是：

表格中的X行数量重复
改变几个字段
按顺序保留自动递增ID。

这是我到目前为止所做的事情。

$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");

当我跑步时，我就到了这条线

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

并且它抛出了这个错误

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。但是，我很遗憾地错了。

Answer 1

我会做什么在你的情况下是删除ID列。从SELECT中，INSERT将自动生成ID。

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

使用更改和自动递增ID重复数据库中的多行

1 个答案: