title: Is AWS RDS capable of master-slave replication?
body: <p>Currently I know AWS RDS official documents can achieve the function of read-only copy
  for example:</p>
  
  <p>The RDS main library is the production library, the main library has 3 tables (a, b, c), the main library uses a read-only copy to create a sub-library, then read-only copy promoted to a database instance, the official link is as follows:</p>
  
  <p><a href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html" rel="noreferrer">https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html</a> </p>
  
  <p>After upgrading a read replica to a DB instance(I call it new DB instance), what steps would be taken if I wanted this new DB instance to fulfill the following requirements:</p>
  
  <p>The new database instance has 5 tables (a, b, c, d, e), of which a, b, c three tables to be consistent with the data of the three tables in the main library (equivalent to these three tables is the main Read-only copy of the library), and d, e two tables can be modified.</p>