运行查询在嵌套循环

之前解释的代码，我来解释数据运行查询在嵌套循环

所以我在此格式有数据的结构

=>Department 
==>Category 
===>Sub-Category

存在具有多个类别的多个部门，这些类别有子类别。

有可能是具有相同名称但不同的部门和子类别和类别相同的一个多类。

有表包含所有的数据和产品。我有一个适当的提取数据，并把在

Departments 
Categories => fk is Departments id 
Subcategories => fk is Categories id

一表我正在插入的部门

然后在大类首先我必须得到主管部门的ID，然后在插入类表中的数据：

public function insertDataInCategory($data) 
{ 
    if(!empty($data)){ 
     //pass data from hierarchy 
     foreach ($data as $dkey => $drow) { 
      //get id 
      $this->db->select('id'); 
      $this->db->from('departments'); 
      $this->db->WHERE('name',$dkey); 
      $query = $this->db->get(); 
      //getting department it to identify category 
      $did = $query->result_array(); 

      //adding category from department 
      foreach ($drow as $ckey => $crow) { 
       $cat_content = array(
        'department_id' => $did[0]['id'] , 
        'name' => $ckey , 
        'description' => '' 
       ); 
       $this->db->insert('categories', $cat_content); 
      } 
     } 
    } 
}

在子类第一，我必须得到主管部门的ID为类别之后，我确定这个子类都属于这一类。因此，在这里运行的3个查询正在增加执行时间。

public function insertDataInSubcategory($data) 
{ 
    //pass data from hierarchy 
    if(!empty($data)){ 
     //department foreach 
     foreach ($data as $dkey => $drow) { 
      //category each 
      $this->db->select('id'); 
      $this->db->from('departments'); 
      $this->db->WHERE('name',$dkey); 
      $query = $this->db->get(); 
      //getting department it to identify category 
      $did = $query->result(); 
      foreach ($drow as $ckey => $crow) { 
       //get id 
       $this->db->select('id'); 
       $this->db->from('categories'); 
       $this->db->WHERE('name',$ckey); 
       $this->db->WHERE('department_id',$did[0]->id); 
       $query = $this->db->get(); 
       //getting id of category of sub-category 
       $cid = $query->result_array(); 
       //sub-category foreach 
       foreach ($crow as $skey => $srow) { 
        $scat_content = array(
         'category_id' => $cid[0]['id'] , 
         'name' => $skey , 
         'description' => '' 
        ); 
        $this->db->insert('sub_categories', $scat_content); 
       }  
      } 
     } 
    } 
}

insertDataInCategory和insertDataInSubcategory时间的功能急剧增加。请告诉我如何减少它的时间。和适当的方法插入到表

来源

2017-10-28 Hamza

什么是传递给'insertDataInCategory（$数据）'$ data'的内容'和'insertDataInSubcategory（$数据）'？请显示可能传递的值的结构和简短示例。 – DFriend

请修改功能我下面提到。它将解决你的嵌套循环问题。这里我假设$ this-> db-> insert返回插入的行ID。如果它没有返回id，那么你需要使用select查询来获取它并将它存储在提到的变量中。

public function insertDataInDepartment($data) 
{ 
    if(!empty($data)){ 
     //pass data from hierarchy 
     foreach ($data as $dkey => $drow) { 
       $dept_content = array(
       'name' => $dkey , 
       'description' => '' , 
       'is_active' => 'y' 
      ); 
       $intInsertId = $this->db->insert('departments', $dept_content); 
      insertDataInCategory($drow , $intInsertId); 
     } 
    } 
} 

public function insertDataInCategory($drow, $deptId) 
{ 
     foreach ($drow as $ckey => $crow) { 
      $cat_content = array(
       'department_id' => $did[0]['id'] , 
       'name' => $ckey , 
       'description' => '' 
     ); 
      $intCatId = $this->db->insert('categories', $cat_content); 
      insertDataInSubcategory($crow, $intCatId); 
    } 
} 

public function insertDataInSubcategory($data) 
{ 
     foreach ($crow as $skey => $srow) { 
      $scat_content = array(
       'category_id' => $cid[0]['id'] , 
       'name' => $skey , 
       'description' => '' 
      ); 
      $this->db->insert('sub_categories', $scat_content); 
    } 
}

来源

2017-10-28 13:30:01 Jack

在这段代码中，我没有得到部门的id类别表 – Hamza

我必须改善查询 – Hamza

然后，你必须使用select查询来获得我感兴趣的。 – Jack

问题是您正在多次运行查询，这会增加执行时间。运行单个查询将减少您的时间。

试试这个代码：

public function insertDataInCategory($data) 
{ 
    if(!empty($data)){ 
     //pass data from hierarchy 
     foreach ($data as $dkey => $drow) { 
      //get id 
      //adding category from department 
      foreach ($drow as $ckey => $crow) { 
        $query = "INSERT INTO categories "; 
        $query.= "(department_id, name , description)"; 
        $query.= "VALUES ((SELECT id FROM departments WHERE name = '$dkey') , '$ckey' , '')"; 
        $this->db->query($query); 
      } 
     } 
    } 
} 

public function insertDataInSubcategory($data) 
{ 
    //pass data from hierarchy 
    if(!empty($data)){ 
     //department foreach 
     foreach ($data as $dkey => $drow) { 
      foreach ($drow as $ckey => $crow) { 
       //sub-category foreach 
       foreach ($crow as $skey => $srow) { 
        $query = "INSERT INTO sub_categories "; 
        $query.= "(category_id , name , description)"; 
        $query.= "VALUES ((SELECT id FROM categories WHERE name = '$ckey' && department_id = (SELECT id FROM departments WHERE name = '$dkey')) , '$skey' , '')"; 
        $this->db->query($query); 
       }  
      } 
     } 
    } 
}

现在只有一个连接设置，它会更快插入记录。

来源

2017-12-15 12:10:46 Xitas

运行查询在嵌套循环

回答

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