android - ORMLite Join Queries with Query Builder -

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I have some problems with understanding the questions in ormlite ormlite query builder 4 supports ways to add. 

  join 1 () 2. joinOr (); 3. leftJoin (); 4. leftJoinOr ();   
 I can agree () shows the joining method () in the following picture.  
 Enter image details here  
 Please allow me to share the same pictures Explain the other ways to use?  
 (I can understand the other pair type in the normal SQL, but when it   
 
 
  
> 
 Please explain ways to add other similar pictures to me?   
 I spent a lot of time They should be helpful, they explain what SQL is being used and "or" is part.  
     
  1.  
      join ()  sql < code> INNER is similar to JOIN  In the form it matches your picture.   
  2.  
      joinOr ()  is a SQL  similar to INNER JOIN  but < code> WHERE  parts of two questions meet "ORD" together. The same image as the # 1.   
  3.  
      leftJoin () Like  a SQL  LEFT JOIN , it corresponds to add A in the red area and see  LEFT JOIN   
  4.  
      leftJoinOr ()  is a SQL  similar to LEFT JOIN  as well but  WHERE  There are a few parts of the two questions "OR'd" together as picture # 3.

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