oracle中国如何实现同比,Oracle分析函数实现报表功能(同比,环比,累计,基比)...
CREATE TABLE salaryByMonth(employeeNo varchar2(20),yearMonth varchar2(6),salary number) ;insert into SALARYBYMONTH (EMPLOYEENO, YEARMONTH, SALARY)values (1, '200805', 500);insert into SALARYBYMONTH (E...