标签：week12 20 上机 1981 SALESMAN CLERK emp Oracle 7698
1.%rowtype
SQL>
SQL> declare
2 v_emp scott.emp%rowtype;
3 begin
4 select * into v_emp from scott.emp where empno=7900;
5 DBMS_OUTPUT.PUT_LINE(v_emp.empno||' '||v_emp.sal);
6 end;
7 /
7900 950
PL/SQL procedure successfully completed
2.elsif分支结构
查询emp表中empno=7902的员工，部门号为10的员工工资加100，给部门号为10的员工工资加100，给部门号为10的员工工资加100，剩下的员工工资加400。
SQL> select * from scott.emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7369 SMITH CLERK 7902 1980/12/17 800.00 20
7499 ALLEN SALESMAN 7698 1981/2/20 1600.00 300.00 30
7521 WARD SALESMAN 7698 1981/2/22 1250.00 500.00 30
7566 JONES MANAGER 7839 1981/4/2 2975.00 20
7654 MARTIN SALESMAN 7698 1981/9/28 1250.00 1400.00 30
7698 BLAKE MANAGER 7839 1981/5/1 2850.00 30
7782 CLARK MANAGER 7839 1981/6/9 2450.00 10
7788 SCOTT ANALYST 7566 1987/4/19 3000.00 20
7839 KING PRESIDENT 1981/11/17 5000.00 10
7844 TURNER SALESMAN 7698 1981/9/8 1500.00 0.00 30
7876 ADAMS CLERK 7788 1987/5/23 1100.00 20
7900 JAMES CLERK 7698 1981/12/3 950.00 30
7902 FORD ANALYST 7566 1981/12/3 3000.00 20
7934 MILLER CLERK 7782 1982/1/23 1300.00 10
14 rows selected
SQL>
SQL> declare
2 v_deptno scott.emp.deptno%type;
3 v_zl scott.emp.sal%type;
4 begin
5 select deptno into v_deptno from scott.emp where empno='7902';
6 if v_deptno=10 then v_zl:=100;
7 elsif v_deptno=20 then v_zl:=200;
8 elsif v_deptno=30 then v_zl:=300;
9 else v_zl:=400;
10 end if;
11 update scott.emp set sal=sal+v_zl where empno='7902';
12 end;
13 /
PL/SQL procedure successfully completed
SQL> select * from scott.emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7369 SMITH CLERK 7902 1980/12/17 800.00 20
7499 ALLEN SALESMAN 7698 1981/2/20 1600.00 300.00 30
7521 WARD SALESMAN 7698 1981/2/22 1250.00 500.00 30
7566 JONES MANAGER 7839 1981/4/2 2975.00 20
7654 MARTIN SALESMAN 7698 1981/9/28 1250.00 1400.00 30
7698 BLAKE MANAGER 7839 1981/5/1 2850.00 30
7782 CLARK MANAGER 7839 1981/6/9 2450.00 10
7788 SCOTT ANALYST 7566 1987/4/19 3000.00 20
7839 KING PRESIDENT 1981/11/17 5000.00 10
7844 TURNER SALESMAN 7698 1981/9/8 1500.00 0.00 30
7876 ADAMS CLERK 7788 1987/5/23 1100.00 20
7900 JAMES CLERK 7698 1981/12/3 950.00 30
7902 FORD ANALYST 7566 1981/12/3 3200.00 20
7934 MILLER CLERK 7782 1982/1/23 1300.00 10
14 rows selected
SQL> select empno,sal from scott.emp where empno='7902';
EMPNO SAL
----- ---------
7902 3200.00
3.加入临时变量
SQL>
SQL> declare
2 v_deptno scott.emp.deptno%type;
3 v_zl scott.emp.sal%type;
4 begin
5 select deptno into v_deptno from scott.emp where empno=&&a;
6 if v_deptno=10 then v_zl:=100;
7 elsif v_deptno=20 then v_zl:=200;
8 elsif v_deptno=30 then v_zl:=300;
9 else v_zl:=400;
10 end if;
11 update scott.emp set sal=sal+v_zl where empno=&a;
12 end;
13 /
PL/SQL procedure successfully completed
SQL> select * from scott.emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
7369 SMITH CLERK 7902 1980/12/17 800.00 20
7499 ALLEN SALESMAN 7698 1981/2/20 1600.00 300.00 30
7521 WARD SALESMAN 7698 1981/2/22 1250.00 500.00 30
7566 JONES MANAGER 7839 1981/4/2 2975.00 20
7654 MARTIN SALESMAN 7698 1981/9/28 1250.00 1400.00 30
7698 BLAKE MANAGER 7839 1981/5/1 2850.00 30
7782 CLARK MANAGER 7839 1981/6/9 2450.00 10
7788 SCOTT ANALYST 7566 1987/4/19 3000.00 20
7839 KING PRESIDENT 1981/11/17 5000.00 10
7844 TURNER SALESMAN 7698 1981/9/8 1500.00 0.00 30
7876 ADAMS CLERK 7788 1987/5/23 1100.00 20
7900 JAMES CLERK 7698 1981/12/3 950.00 30
7902 FORD ANALYST 7566 1981/12/3 3400.00 20
7934 MILLER CLERK 7782 1982/1/23 1300.00 10
14 rows selected
SQL> select empno,sal from scott.emp where empno='7902';
EMPNO SAL
----- ---------
7902 3400.00
4.将第2题修改为case语句
SQL>
SQL> select EMPNO,ENAME,JOB,MGR,HIREDATE,SAL,COMM DEPTNO,
2 (case
3 when deptno=10 then sal+100
4 when deptno=20 then sal+200
5 when deptno=30 then sal+300
6 else sal+400
7 end)as
8 加薪后工资 from scott.emp;
EMPNO ENAME JOB MGR HIREDATE SAL DEPTNO 加薪后工资
----- ---------- --------- ----- ----------- --------- --------- ----------
7369 SMITH CLERK 7902 1980/12/17 800.00 1000
7499 ALLEN SALESMAN 7698 1981/2/20 1600.00 300.00 1900
7521 WARD SALESMAN 7698 1981/2/22 1250.00 500.00 1550
7566 JONES MANAGER 7839 1981/4/2 2975.00 3175
7654 MARTIN SALESMAN 7698 1981/9/28 1250.00 1400.00 1550
7698 BLAKE MANAGER 7839 1981/5/1 2850.00 3150
7782 CLARK MANAGER 7839 1981/6/9 2450.00 2550
7788 SCOTT ANALYST 7566 1987/4/19 3000.00 3200
7839 KING PRESIDENT 1981/11/17 5000.00 5100
7844 TURNER SALESMAN 7698 1981/9/8 1500.00 0.00 1800
7876 ADAMS CLERK 7788 1987/5/23 1100.00 1300
7900 JAMES CLERK 7698 1981/12/3 950.00 1250
7902 FORD ANALYST 7566 1981/12/3 3400.00 3600
7934 MILLER CLERK 7782 1982/1/23 1300.00 1400
14 rows selected
5.case语句
学生表根据成绩划分高中低等级
SQL>
SQL> select xh,xm,zxf,(
2 case
3 when zxf>50 then '高'
4 when zxf>=40 then '中'
5 else '学分不够，还需继续！'
6 end)as 学生等级 from xs;
XH XM ZXF 学生等级
------ ------ --- --------------------
061101 王林 50 中
101112 李明 36 学分不够，还需继续！
001 张琼 45 中
121112 王小二 36 学分不够，还需继续！
6.查询图书借阅是否到期
SQL>
SQL> select EMPNO,ENAME,JOB,MGR,HIREDATE,
2 (case
3 when sysdate-HIREDATE>60 then '已到期'
4 else '未到期'
5 end) as
6 借阅是否到期 from scott.emp;
EMPNO ENAME JOB MGR HIREDATE 借阅是否到期
----- ---------- --------- ----- ----------- ------------
7369 SMITH CLERK 7902 1980/12/17 已到期
7499 ALLEN SALESMAN 7698 1981/2/20 已到期
7521 WARD SALESMAN 7698 1981/2/22 已到期
7566 JONES MANAGER 7839 1981/4/2 已到期
7654 MARTIN SALESMAN 7698 1981/9/28 已到期
7698 BLAKE MANAGER 7839 1981/5/1 已到期
7782 CLARK MANAGER 7839 1981/6/9 已到期
7788 SCOTT ANALYST 7566 1987/4/19 已到期
7839 KING PRESIDENT 1981/11/17 已到期
7844 TURNER SALESMAN 7698 1981/9/8 已到期
7876 ADAMS CLERK 7788 1987/5/23 已到期
7900 JAMES CLERK 7698 1981/12/3 已到期
7902 FORD ANALYST 7566 1981/12/3 已到期
7934 MILLER CLERK 7782 1982/1/23 已到期
14 rows selected
SQL>
SQL> select empno,ename,job,hiredate,
2 (
3 case
4 when trunc(sysdate-HIREDATE)>60 then '已过期'
5 when hiredate is null then '没借书'
6 else '未过期'
7 end
8 )
9 as 借阅是否到期 from scott.emp;
EMPNO ENAME JOB HIREDATE 借阅是否到期
----- ---------- --------- ----------- ------------
7369 SMITH CLERK 1980/12/17 已过期
7499 ALLEN SALESMAN 1981/2/20 已过期
7521 WARD SALESMAN 1981/2/22 已过期
7566 JONES MANAGER 1981/4/2 已过期
7654 MARTIN SALESMAN 1981/9/28 已过期
7698 BLAKE MANAGER 1981/5/1 已过期
7782 CLARK MANAGER 1981/6/9 已过期
7788 SCOTT ANALYST 1987/4/19 已过期
7839 KING PRESIDENT 1981/11/17 已过期
7844 TURNER SALESMAN 1981/9/8 已过期
7876 ADAMS CLERK 1987/5/23 已过期
7900 JAMES CLERK 1981/12/3 已过期
7902 FORD ANALYST 1981/12/3 已过期
7934 MILLER CLERK 1982/1/23 已过期
14 rows
标签：week12,20,上机,1981,SALESMAN,CLERK,emp,Oracle,7698 来源： https://blog.csdn.net/Bella_Seven/article/details/122470071
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。