Question

copy tables and data from one scema to another

Asked by: mmatharu

I have two schemaÃƒÂ¢Ã‚Â€Ã‚Â™s and want to copy some of the tables and the data in the tables from schema A to schema B and but when I take over the tables I want to change the tablespace and rename the table, I want to create a script for this so that I can run it many time could I have some help to create the script.

Thanks

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Asked On: 2008-01-14 at 07:45:29ID23080992
Tags: Orcale 10g
,; Oracle 10g SQL script
Topics: Oracle 10.x
,; PL / SQL
Participating Experts: 3
Points: 500
Comments: 17

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Answers

by: johnsonePosted on 2008-01-14 at 08:10:55ID: 20653981

These should be the commands you need:

As SCHEMA_A

GRANT SELECT ON <old_tab> to <schema_b>;

As SCHEMA_B

CREATE TABLE <new_tabl> TABLESPACE <new_ts> AS SELECT * FROM <schema_a>.<old_tab>;

There would be many different ways to script this, what kind of script are you looking for? SQL, PL/SQL, Shell, Perl, etc.

by: mmatharuPosted on 2008-01-14 at 08:20:35ID: 20654070

SQL or PL/SQL which every is faster and more convienient

by: johnsonePosted on 2008-01-14 at 10:09:51ID: 20655076

A PL/SQL procedure would be pretty easy.

The owner of the procedure needs these 2 grants:

GRANT GRANT ANY OBJECT PRIVILEGE TO <own>;
GRANT CREATE ANY TABLE TO <own>;

These are required because PL/SQL does not understand privileges granted through roles.

As a catch, the procedure cannot be created under the new owner as you cannot grant privileges to yourself.

create or replace procedure copy_tab
         (old_own varchar2,
          old_tab varchar2,
          new_own varchar2,
          new_tab varchar2,
          new_ts  varchar2
         ) as
begin
  execute immediate 'grant select on "' || old_own || '"."' || old_tab || '" to "' || new_own || '"';
  execute immediate 'create table "' || new_own || '"."' || new_tab || '" tablespace ' || new_ts || ' as select * from "' || old_own || '"."' || old_tab || '"';
end;

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by: johnsonePosted on 2008-01-14 at 10:11:00ID: 20655088

Sorry, posted the wrong version of the procedure. This is the correct one.

create or replace procedure copy_tab
         (old_own varchar2,
          old_tab varchar2,
          new_own varchar2,
          new_tab varchar2,
          new_ts  varchar2
         ) as
begin
  execute immediate 'grant select on ' || old_own || '.' || old_tab || ' to ' || new_own || '';
  execute immediate 'create table ' || new_own || '.' || new_tab || ' tablespace ' || new_ts || ' as select * from ' || old_own || '.' || old_tab || '';
end;
/

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by: Igor_SandPosted on 2008-01-14 at 10:23:57ID: 20655190

Hi. You can make an export of schema, or tables. You can do it in PL/SQL Developer or in TOAD IDE's for example. Those IDE can generate pl/sql scripts and then you can change those scripts to change tablespace or table names... In IDE it will took you just 5 seconds :-)

by: Igor_SandPosted on 2008-01-14 at 10:27:30ID: 20655229

mmatharu, if you don't know how to make an export in those IDE's, let me know, i'll post detailed instruction...

by: joebednarzPosted on 2008-01-14 at 11:34:07ID: 20655901

Though not "exactly" what you were looking for, I'd try using this:

COPY FROM schema_a/your_password@DB -
TO schema_b/your_password@DB -
CREATE new_emp_name (DEPARTMENT_ID, DEPARTMENT_NAME, CITY) -
USING SELECT department_id, depart_name, city FROM emp;

You can't specify which TABLESPACE the NEW_EMP_NAME table is created in, however, it will be created in the DEFAULT TABLESPACE of the the SCHEMA_B user...

by: joebednarzPosted on 2008-01-14 at 11:34:23ID: 20655906

... btw, run from SQL*plus

by: mmatharuPosted on 2008-01-14 at 19:24:28ID: 20659801

actually i was just wandering if there was an SQL script i could make as it will be about 40 tables and use some similar to johnsone procedure

'create table ' || new_own || '.' || new_tab || ' tablespace ' || new_ts || ' as select * from ' || old_own || '.' || old_tab || '';

by: Igor_SandPosted on 2008-01-14 at 22:58:04ID: 20660638

Why don't you want to use IDE's export mechanism? IDE will generate you all the scripts you need, and then you can change them as you wish...

by: Igor_SandPosted on 2008-01-14 at 23:06:12ID: 20660664

In toad: Menu Database -> Export -> Generate Schema Script.
Menu Database -> Export -> Table Data.
That's it....

by: mmatharuPosted on 2008-01-15 at 01:20:29ID: 20661099

okay I will try it through toad but if I want to do this many time it would be eaier to just fire off a script

by: Igor_SandPosted on 2008-01-15 at 02:35:38ID: 20661379

toad will just generate that script. Save it wherever you want, change table names, tablespaces, add drop table statements and fire it as many times as you need :-)

by: johnsonePosted on 2008-01-15 at 04:30:07ID: 20661892

I believe the intent is to run a script or procedure that will do this without having to edit each file. For a small number of tables, the TOAD solution is probably fine, but when doing a large number of tables it becomes cumbersome.

by: Igor_SandPosted on 2008-01-15 at 04:46:26ID: 20661977

if you should to change 40 table names, you will do it and in your oun script and in toad generated script, i think...

20120131-EE-VQP-002

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Question

copy tables and data from one scema to another

Subscribe now for full access to Experts Exchange and get

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Orcale 10g

Oracle 10g SQL script

Oracle 10.x

PL / SQL

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