4. Confirm that the synonyms work (even to the extent of producing the same
errors) by running the statements in Exercise 7-7 against the synonyms
instead of the views:
select * from dsum_s;insert into dept_s values(99,'Temp Dept',1800);insert into emp_s values(sysdate,'AC_MGR',10000,0,99);update emp_s set salary=salary*1.1;rollback;select max(salaries / staff) from dsum_s;
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