/* IGNOU MCA SOLVED QUESTION PAPER MCSL-045 DEC-2012*/ create table Sales_Person (S_id number, S_name varchar2(30), Experience number, S_Designation varchar2(30), S_product varchar2(30)); create table Sales_Record (S_id number, S_target number, S_sold number, S_order number); create table Sales_Salary (S_id number, S_basic number, S_grade number, S_salary number); /* A trigger for auto update SALARY */ CREATE OR REPLACE TRIGGER CL_SALARY AFTER INSERT OR DELETE OR UPDATE ON Sales_Person BEGIN UPDATE SALES_SALARY SET S_SALARY=S_BASIC+S_GRADE; END CL_SALARY; INSERT INTO Sales_Person VALUES(5, 'TUHIN SUMANTA', 30,'MANAGER','COSMETICS'); INSERT INTO Sales_Record VALUES(4,70,65,22); INSERT INTO SALES_SALARY VALUES(5,7850,500,0); UPDATE SALES_SALARY SET S_SALARY=S_BASIC+S_GRADE; SELECT * FROM SALES_PERSON; SELECT * FROM SALES_RECORD; SELECT * FROM SALES_SALARY; /* Creating View with JOIN */ CREATE OR REPLACE VIEW S_VIEW_...