storage_data.xml

<application>
  <component name="AppStorage">
    <histories>
      <item value="With the DAO pattern , we can use various method calls to retrieve / add / delete / update data without directly interacting with the data source . The below example demonstrates basic CRUD operations : select , add , update , and delete ." />
      <item value="Data Access Object ( DAO ) is an object that provides an abstract interface to some type of database or other persistence mechanism . By mapping application calls to the persistence layer , DAO provide some specific data operations without exposing details of the database . This isolation supports the Single responsibility principle . It separates what data accesses the application needs , in terms of domain - specific objects and data types ( the public interface of the DAO ), from how these needs can be satisfied with a specific DBMS" />
      <item value="DAO" />
      <item value="tansfer To Arg" />
      <item value="r list Score Exp Rank" />
      <item value="R User Rank Info" />
      <item value="user Rank Info Redis" />
    </histories>
  </component>
</application>