• What is Export / Import 
  How it works
  How to Set UP
• How to Export/Import Table
• How to Export/Import Schema
• How to Export/import Database
• How to monitor the current jobs
• What to Do If a Data Pump Job Crashes
• Can we restart failed or Crashed Data Pump Jobs
• How to run exp/job using parfile
• Data Pump Export Progress %

Data Pump / Export-Import - Concepts

Document: Database Upgrade from 12c to 19c using Datapump