SQL Server:

begin try
......
end try
begin catch
    print('--------------------exception-----------------------');
    print(@@ERROR);
    PRINT('ERROR_NUMBER=' + STR(ERROR_NUMBER()));
    PRINT('ERROR_SEVERITY=' + STR(ERROR_SEVERITY()));
    PRINT('ERROR_STATE=' + STR(ERROR_STATE()));
    PRINT('ERROR_MESSAGE=' + ERROR_MESSAGE());
    rollback;
end catch

Oracle:

exception WHEN others THEN
   dbms_output.PUT_LINE(sqlerrm);
   rollback;
end;