Yes,
you are correct there are several methods for copying tables
between schemas, some direct and some indirect. If the
schemas are within the same database the "create table as
select" is a simple way to copy a table from one schema to
another. Below we copy a table between the smith
and jones schemas:
create table
jones.fred1
as
select * from smith.fred1;
Also see:
- Use
CTAS to copy the tables, and then punch & re-add
constraints and indexes using
dbms_metadata. Parallelized CTAS is a faster way to copy
a table.
- Use the SQL*Plus
copy command
When the schemas are within different databases then we
have two approaches to copying table between schemas:
- Direct table
copying: This requires the use of a
database link.
- Indirect
data copying: This requires using the
database pump utility, a three-step
copy
process. This has the advantage because you can also
copy the table indexes and
constraints between the schemas:
a) use
expdp to export the table(s)
b) Use FTP to move the
export file to the new database server
c) Use
impdp to import the tables into the new database schema
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