ORACLE SQL: 클래식 조회 트 레이 너 1 편 (모 르 는 척, 영세 밥통!)
Name Type Nullable Default Comments
-------- ------------ -------- ------- --------
EMPNO NUMBER(4)
ENAME VARCHAR2(10) Y
JOB VARCHAR2(9) Y
MGR NUMBER(4) Y
HIREDATE DATE Y
SAL NUMBER(7,2) Y
COMM NUMBER(7,2) Y
DEPTNO NUMBER(2) Y
부서 표
Name Type Nullable Default Comments
------ ------------ -------- ------- --------
DEPTNO NUMBER(2)
DNAME VARCHAR2(14) Y
LOC VARCHAR2(13) Y
알림: 임금 = 임금 + 커미션
scott. emp 표 의 기 존 데 이 터 는 다음 과 같 습 니 다.
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
SMITH CLERK 7902 1980-12-17 800.00 20
ALLEN SALESMAN 7698 1981-2-20 1600.00 300.00 30
WARD SALESMAN 7698 1981-2-22 1250.00 500.00 30
JONES MANAGER 7839 1981-4-2 2975.00 20
MARTIN SALESMAN 7698 1981-9-28 1250.00 1400.00 30
BLAKE MANAGER 7839 1981-5-1 2850.00 30
CLARK MANAGER 7839 1981-6-9 2450.00 10
SCOTT ANALYST 7566 1987-4-19 4000.00 20
KING PRESIDENT 1981-11-17 5000.00 10
TURNER SALESMAN 7698 1981-9-8 1500.00 0.00 30
ADAMS CLERK 7788 1987-5-23 1100.00 20
JAMES CLERK 7698 1981-12-3 950.00 30
FORD ANALYST 7566 1981-12-3 3000.00 20
MILLER CLERK 7782 1982-1-23 1300.00 10
EricHu Developer 1455 2011-5-26 1 5500.00 14.00 10
huyong PM 1455 2011-5-26 1 5500.00 14.00 10
WANGJING Developer 1455 2011-5-26 1 5500.00 14.00 10
rows selected
Scott. dept 표 의 기 존 데 이 터 는 다음 과 같 습 니 다.
SQL> select * from dept;
DEPTNO DNAME LOC
------ -------------- -------------
ACCOUNTING NEW YORK
RESEARCH DALLAS
SALES CHICAGO
OPERATIONS BOSTON
50abc 50def
Developer HaiKou
rows selected
다음 질문 목록 을 SQL 로 완성 합 니 다:
1． 。
2． “SMITH” 。
3． 。
4． 。
5． ，
6． “CLERK”（ ） 。
7． 1500 。
8． “SALES”（ ） ， 。
9． 。
10． “SCOTT” 。
11． 30 。
12． 30 。
13． 、 。
14． 、 。
15． 。
16． 。
17． MANAGER（ ） 。
18． , 。
각 답 은 아래 와 같 습 니 다. 여러분 이 제시 하지 못 한 해답 방식 을 환영 합 니 다.
--------1． 。---------
SQL> select dname from dept where deptno in(select deptno from emp);
DNAME
--------------
RESEARCH
SALES
ACCOUNTING
-------- --------
SQL> select dname from dept where deptno in(select deptno from emp group by deptno having count(deptno) >=1);
DNAME
--------------
ACCOUNTING
RESEARCH
SALES
--------2． “SMITH” 。----------
SQL> select * from emp where sal > (select sal from emp where ename = 'SMITH');
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
----- ---------- --------- ----- ----------- --------- --------- ------
ALLEN SALESMAN 7698 1981-2-20 1600.00 300.00 30
WARD SALESMAN 7698 1981-2-22 1250.00 500.00 30
JONES MANAGER 7839 1981-4-2 2975.00 20
MARTIN SALESMAN 7698 1981-9-28 1250.00 1400.00 30
BLAKE MANAGER 7839 1981-5-1 2850.00 30
CLARK MANAGER 7839 1981-6-9 2450.00 10
SCOTT ANALYST 7566 1987-4-19 4000.00 20
KING PRESIDENT 1981-11-17 5000.00 10
TURNER SALESMAN 7698 1981-9-8 1500.00 0.00 30
ADAMS CLERK 7788 1987-5-23 1100.00 20
JAMES CLERK 7698 1981-12-3 950.00 30
FORD ANALYST 7566 1981-12-3 3000.00 20
MILLER CLERK 7782 1982-1-23 1300.00 10
EricHu Developer 1455 2011-5-26 1 5500.00 14.00 10
huyong PM 1455 2011-5-26 1 5500.00 14.00 10
WANGJING Developer 1455 2011-5-26 1 5500.00 14.00 10
rows selected
--------3． 。----------
SQL> select a.ename,(select ename from emp b where b.empno=a.mgr) as boss_name from emp a;
ENAME BOSS_NAME
---------- ----------
SMITH FORD
ALLEN BLAKE
WARD BLAKE
JONES KING
MARTIN BLAKE
BLAKE KING
CLARK KING
SCOTT JONES
KING
TURNER BLAKE
ADAMS SCOTT
JAMES BLAKE
FORD JONES
MILLER CLARK
EricHu
huyong
WANGJING
rows selected
--------4． 。----------
SQL> select a.ename from emp a where a.hiredate select a.dname,b.empno,b.ename,b.job,b.mgr,b.hiredate,b.sal,b.deptno
from dept a left join emp b on a.deptno=b.deptno;
DNAME EMPNO ENAME JOB MGR HIREDATE SAL DEPTNO
-------------- ----- ---------- --------- ----- ----------- --------- ------
RESEARCH 7369 SMITH CLERK 7902 1980-12-17 800.00 20
SALES 7499 ALLEN SALESMAN 7698 1981-2-20 1600.00 30
SALES 7521 WARD SALESMAN 7698 1981-2-22 1250.00 30
RESEARCH 7566 JONES MANAGER 7839 1981-4-2 2975.00 20
SALES 7654 MARTIN SALESMAN 7698 1981-9-28 1250.00 30
SALES 7698 BLAKE MANAGER 7839 1981-5-1 2850.00 30
ACCOUNTING 7782 CLARK MANAGER 7839 1981-6-9 2450.00 10
RESEARCH 7788 SCOTT ANALYST 7566 1987-4-19 4000.00 20
ACCOUNTING 7839 KING PRESIDENT 1981-11-17 5000.00 10
SALES 7844 TURNER SALESMAN 7698 1981-9-8 1500.00 30
RESEARCH 7876 ADAMS CLERK 7788 1987-5-23 1100.00 20
SALES 7900 JAMES CLERK 7698 1981-12-3 950.00 30
RESEARCH 7902 FORD ANALYST 7566 1981-12-3 3000.00 20
ACCOUNTING 7934 MILLER CLERK 7782 1982-1-23 1300.00 10
ACCOUNTING 102 EricHu Developer 1455 2011-5-26 1 5500.00 10
ACCOUNTING 104 huyong PM 1455 2011-5-26 1 5500.00 10
ACCOUNTING 105 WANGJING Developer 1455 2011-5-26 1 5500.00 10
50abc
OPERATIONS
Developer
rows selected
--------6． “CLERK”（ ） 。----------
SQL> select a.ename,b.dname from emp a join dept b on a.deptno=b.deptno and a.job='CLERK';
ENAME DNAME
---------- --------------
SMITH RESEARCH
ADAMS RESEARCH
JAMES SALES
MILLER ACCOUNTING
--------7． 1500 。----------
SQL> select distinct job as HighSalJob from emp group by job having min(sal)>1500;
HIGHSALJOB
----------
ANALYST
Developer
MANAGER
PM
PRESIDENT
--------8． “SALES”（ ） ， 。----------
SQL> select ename from emp where deptno=(select deptno from dept where dname='SALES');
ENAME
----------
ALLEN
WARD
MARTIN
BLAKE
TURNER
JAMES
rows selected
--------9． 。----------
SQL> select ename from emp where sal>(select avg(sal) from emp);
ENAME
----------
JONES
BLAKE
SCOTT
KING
FORD
EricHu
huyong
WANGJING
rows selected
--------10． “SCOTT” 。--------
SQL> select ename from emp where job=(select job from emp where ename='SCOTT');
ENAME
----------
SCOTT
FORD
--------11． 30 。---------
SQL> select a.ename,a.sal from emp a where a.sal in (select b.sal
from emp b where b.deptno=30) and a.deptno<>30;
ENAME SAL
---------- ---------
--------12． 30 。---------
SQL> select ename,sal from emp where sal>(select max(sal) from emp where deptno=30);
ENAME SAL
---------- ---------
JONES 2975.00
SCOTT 4000.00
KING 5000.00
FORD 3000.00
EricHu 5500.00
huyong 5500.00
WANGJING 5500.00
rows selected
--------13． 、 。---------
SQL> select (select b.dname from dept b where a.deptno=b.deptno) as deptname ,count(deptno) as deptcount,avg(sal) as deptavgsal
from emp a group by deptno;
DEPTNAME DEPTCOUNT DEPTAVGSAL
-------------- ---------- ----------
ACCOUNTING 6 4208.33333
RESEARCH 5 2375
SALES 6 1566.66666
--------14． 、 。---------
SQL> select a.ename,(select b.dname from dept b where b.deptno=a.deptno) as deptname,sal from emp a;
ENAME DEPTNAME SAL
---------- -------------- ---------
SMITH RESEARCH 800.00
ALLEN SALES 1600.00
WARD SALES 1250.00
JONES RESEARCH 2975.00
MARTIN SALES 1250.00
BLAKE SALES 2850.00
CLARK ACCOUNTING 2450.00
SCOTT RESEARCH 4000.00
KING ACCOUNTING 5000.00
TURNER SALES 1500.00
ADAMS RESEARCH 1100.00
JAMES SALES 950.00
FORD RESEARCH 3000.00
MILLER ACCOUNTING 1300.00
EricHu ACCOUNTING 5500.00
huyong ACCOUNTING 5500.00
WANGJING ACCOUNTING 5500.00
rows selected
--------15． 。---------
SQL> select a.deptno,a.dname,a.loc,(select count(deptno) from emp b where b.deptno=a.deptno group by b.deptno) as deptcount from dept a;
DEPTNO DNAME LOC DEPTCOUNT
------ -------------- ------------- ----------
ACCOUNTING NEW YORK 6
RESEARCH DALLAS 5
SALES CHICAGO 6
OPERATIONS BOSTON
50abc 50def
Developer HaiKou
rows selected
--------16． 。---------
SQL> select job,avg(sal) from emp group by job;
JOB AVG(SAL)
--------- ----------
ANALYST 3500
CLERK 1037.5
Developer 5500
MANAGER 2758.33333
PM 5500
PRESIDENT 5000
SALESMAN 1400
rows selected
--------17． MANAGER（ ） 。--------
SQL> select deptno,min(sal) from emp where job='MANAGER' group by deptno;
DEPTNO MIN(SAL)
------ ----------
2450
2975
2850
--------18． , 。---------
SQL> select ename,(sal+nvl(comm,0))*12 as salpersal from emp order by salpersal;
ENAME SALPERSAL
---------- ----------
SMITH 9600
JAMES 11400
ADAMS 13200
MILLER 15600
TURNER 18000
WARD 21000
ALLEN 22800
CLARK 29400
MARTIN 31800
BLAKE 34200
JONES 35700
FORD 36000
SCOTT 48000
KING 60000
EricHu 66168
huyong 66168
WANGJING 66168
rows selected
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