Oracle Import and Export

1. Create a directory folder for exporting data

create or replace directory oradata as 'E:\data';

Note:

(1) The data folder needs to be installed under the disk.

(2) If the prompt is insufficient, you need to authorize the current user

如：grant read,write  on directory oradata;

2. Use expdp to export user data

(1) Only the metadata of the soctt user is exported without statistical information;

expdp system directory=oradata schemas=scott content=metadata_only exclude=statistics dumpfile=scott_meta.dmp logfile=scott_meta.log

(2) Only export data of soctt users

expdp system directory=oradata schemas=scott content=data_only 

dumpfile=scott_data.dmp logfile=scott_data.log

(3) Only export the emp and dept data under the scott user

expdp scott directory=oradata tables=emp,dept 

dumpfile=scott_emp_dept.dmp logfile=scott_emp_dept.log

(4) Only export the emp and dept table structures under the scott user

expdp scott directory=oradata tables=emp,dept content=metadata_only 

dumpfile=scott_emp_dept_meta.dmp logfile=scott_emp_dept_meta.log

(5) Export all content under the soctt user

expdp system directory=oradata schemas=scott dumpfile=scott_all.dmp 

logfile=scott_all.log

(6) Export all content under the scott user in parallel

expdp system directory=oradata schemas=scott dumpfile=scott_all%U.dmp 

logfile=scott_all.log parallel=2