Steps to reproduce the issue:
Check "Display numbers in Scientific notation" in View | Toad options | Data
Then create table below in schema1
CREATE table testCopyData (column1 number);
INSERT INTO testcopydata(column1) VALUES (275476011506390971875386577750472180974);
commit;
Select the table in the Schema Browser, r-click and select Data | Copy to another schema
Select the Destination Connection/Schema and execute
Now uncheck "Display numbers in Scientific notation" in View | Toad options | Data
Go to the Destination Connection/Schema and see the data in the new table created there.
The data is 275476011506391000000000000000000000000 whereas in the original table is 275476011506390971875386577750472180974.
