一 需求
给员工职位涨工资,
总裁涨1000
,经理涨800,
其他员工涨400
二 设计(伪代码)
ResultSet rs = "select empno,job from emp";
while(re.next())
{
int eno =rs.getInt("empno");
String job = rs.getString("job");
if(“PERSIDENT”.equals ( job))
{
update emp set sal = sal +1000 where empno = eno;
}
else if(“MANAGER”.equals ( job))
{
update emp set sal = sal +800 where empno = eno;
}
else
{
update emp set sal = sal +400 where empno = eno;
}
}
三 涨工资前数据
SQL>select*from emp;
EMPNO ENAME EMPJOB MGR HIREDATE SAL COMM DEPTNO
-----------------------------------------------------------------------------------
7369 SMITH CLERK 790217-12月-80240020
7499 ALLEN SALESMAN 769820-2月-81320030030
7521 WARD SALESMAN 769822-2月-81285050030
7566 JONES MANAGER 783902-4月-81617520
7654 MARTIN SALESMAN 769828-9月-812850140030
7698 BLAKE MANAGER 783901-5月-81605030
7782 CLARK MANAGER 783909-6月-81565010
7788 SCOTT ANALYST 756619-4月-87460020
7839 KING PRESIDENT 17-11月-81900010
7844 TURNER SALESMAN 769808-9月-813100030
7876 ADAMS CLERK 778823-5月-87270020
EMPNO ENAME EMPJOB MGR HIREDATE SAL COMM DEPTNO
-----------------------------------------------------------------------------------
7900 JAMES CLERK 769803-12月-81255030
7902 FORD ANALYST 756603-12月-81460020
7934 MILLER CLERK 778223-1月-82290010
已选择14行。
四 代码
--给员工职位涨工资
set serveroutput on
declare
--定义一个光标代表给哪些员工涨工资
cursor cemp isselect empno,empjob from emp;
--为光标定义对应的变量
pempno emp.empno%type;
pjob emp.empjob%type;
begin
--打开光标
open cemp;
loop
--取一个员工
fetch cemp into pempno,pjob;
exitwhen cemp%notfound;
--判断员工职位
if pjob ='PRESIDENT'then update emp set sal =sal +1000where empno = pempno;
elsif pjob ='MANAGER'then update emp set sal =sal +800where empno = pempno;
else update emp set sal =sal +400where empno = pempno;
endif;
end loop;
--关闭光标
close cemp;
--对于oracle,默认的事务隔离级别是read committed
--事务ACID
commit;
dbms_output.put_line('涨工资完成');
end;
/
五 涨工资后数据
SQL>select*from emp;
EMPNO ENAME EMPJOB MGR HIREDATE SAL COMM DEPTNO
-----------------------------------------------------------------------------------
7369 SMITH CLERK 790217-12月-80280020
7499 ALLEN SALESMAN 769820-2月-81360030030
7521 WARD SALESMAN 769822-2月-81325050030
7566 JONES MANAGER 783902-4月-81697520
7654 MARTIN SALESMAN 769828-9月-813250140030
7698 BLAKE MANAGER 783901-5月-81685030
7782 CLARK MANAGER 783909-6月-81645010
7788 SCOTT ANALYST 756619-4月-87500020
7839 KING PRESIDENT 17-11月-811000010
7844 TURNER SALESMAN 769808-9月-813500030
7876 ADAMS CLERK 778823-5月-87310020
EMPNO ENAME EMPJOB MGR HIREDATE SAL COMM DEPTNO
-----------------------------------------------------------------------------------
7900 JAMES CLERK 769803-12月-81295030
7902 FORD ANALYST 756603-12月-81500020
7934 MILLER CLERK 778223-1月-82330010
已选择14行。