background
- In doing data migration, you need to integrate different parts of the dmp file to a database, when importing, the target table already exists, how to append the data into the target table
Methods Introduction
- When IMPDP complete database import, while in case of the table already exists, Oracle provide us with the following four treatments:
- SKIP: Skip existing tables, to continue introducing the next object, if CONTENT DATA_ONLY set parameters, can not use the SKIP
- APPEND: does not affect the existing data in the original data table on the data continues to increase
- REPLACE: deleted table first, and then create a table, insert the data to finalize
- TRUNCATE: delete the existing line, and then insert all the data
use
- We need to specify the mode used to import the data import statement TABLE_EXISTS_ACTION parameters, as follows
impdp zcgl/system dumpfile=GUIDONG.DMP directory=data_pump_dir REMAP_TABLESPACE=ASSETS:ZCGL REMAP_SCHEMA=TESTUSER:ZCGL TABLE_EXISTS_ACTION=APPEND logfile=TEST20191111.log - Next