Oracle Wokspace 4

dbms_wm.gotodate

begin
dbms_wm.gotoworkspace('B_focus_1');
end;

insert into test values (6,'Wayanad','YS','n',null,sysdate);

select * from test order by one ;

begin
dbms_wm.gotodate( (sysdate-5)) ;
end;

select * from test order by one ;

begin
dbms_wm.gotoworkspace('B_focus_1');
end;

select * from test order by one ;

Freezeworkspace

begin
dbms_wm.freezeworkspace('B_focus_1', 'READ_ONLY');
end;

insert into test values (6,'Wayanad','YS','n',null,sysdate);


This Error will be throwed when we try any DML operations (here to insert data) into a readonly workspace.

ORA-20123: workspace 'B_focus_1' is currently frozen in READ_ONLY mode


Export And Import Implications
The following implications are a result of version-enabling tables:

* Imports of version-enabled tables can only be performed if the target database has Workspace Manager installed and no workspaces defined other than LIVE.
* Only full database exports are supported with version-enabled databases.
* The IGNORE=Y parameter must be set for imports of version enabled databases.
* Imports of version-enabled databases cannot use the FROMUSER and TOUSER functioanlity.

For More about workspaces Refer  here