title: Validation in postgreSQL
body: <p>I made an application to collect data from users.  Those data will be collected at different places and from these places will be sent to a central server.  I need to design a validation plan for the central server in PostgreSQL.  Data must be checked against various validations and if a validation fails a message must be thrown.</p>
  
  <p>It is database to database transfer validation.</p>