title: Fastest way to insert data to database for one to many relationship
body: <p>I am looking for a fastest way to insert data into database.</p>
  
  <p>Currently I have 2 tables which is "User" and "User_Detail".
  One "User" can has many "User_detail"
  Example:</p>
  
  <p>In database,we have the record of Age and mail for user "John".</p>
  
  <p>User table</p>
  
  <pre><code>|Name     |
  |---------|
  | John    | 
  | Jason   |  
  | Wilson  | 
  </code></pre>
  
  <p>User_Detail table</p>
  
  <pre><code>| Usr_Name| Property | Value  |
  |---------+----------+--------|
  | John    | Age      | 12     |
  | John    | mail     | gmail  |
  | Wilson  | Age      | 31     |
  </code></pre>
  
  <p>I would like to write a query to add "uni" to ALL of the users.
  The result will become like this.</p>
  
  <p>User_Detail table</p>
  
  <pre><code>| Usr_Name | Property | Value  |
  |----------+----------+--------|
  | John     | Age      | 12     |
  | John     | mail     | gmail  |
  | John     | Uni      | 00000  |
  | Wilson   | Age      | 31     |
  | Wilson   | Uni      | 00000  |
  | Jason    | Uni      | 00000  |
  </code></pre>
  
  <p>Is there any suggestions or ideas on how to insert data ?
  I need the fastest way to do it, as I have around 10k users in my USER table.
  It can be any language or database query, as long as it can be very fast to insert the record to database.</p>