将多个删除查询修改为尽可能少的更新查询？

Question

目前，我们有这样的代码片段：

$this->db->where('id', $id)->delete($this->table); 
$this->db->where('product_id', $id)->delete($this->clink); 
$this->db->where('product_id', $id)->delete($this->tlink); 

$variants = $this->db->select('id')->from($this->vlink)->where('product_id', $id)->get(); 
if ($variants->num_rows() !== 0) { 

    //turns array(array('id' => 1), array('id' => 2)) into array(1,2) 
    $variants = $variants->result_array(); 
    foreach ($variants as &$v) { 
     $v = $v['id']; 
    } 

    $this->db->where('product_id', $id)->delete($this->vlink); 
    $this->db->where_in('variant_id', $variants)->delete('cart_variant_values'); 
    $this->db->where_in('variant_id', $variants)->delete('cart_variant_images'); 
    $this->db->where_in('variant_id', $variants)->delete('cart_variant_documents'); 
} 

换算成这样：

delete from $this->table where id = $id 
delete from $this->clink where product_id = $id 
delete from $this->tlink where product_id = $id 

$variants = select id from $this->vlink where product_id = $id //e.g. (1,2) 

delete from $this->vlink where product_id = $id 
delete from cart_variant_values where variant_id in $variants 
delete from cart_variant_images where variant_id in $variants 
delete from cart_variant_documents where variant_id in $variants 

现在我需要修改代码，而不是删除所有的行，它设置对他们的end_date列所有。

我知道我可以修改它。留下它与相同数量的查询，但我希望是一个更新而不是删除我可以缩减成更少的查询？

Answer 1

如果你担心删除查询的数量，您可以使用多个数据表删除查询，通过它可以将其降低到一个单一的查询
DELETE Syntax

可以实现UPDATE太
多表查询 UPDATE Syntax