ORACLE SQL: 经典查询练手第三篇
本文使用ORACLE自带的人力资源(HR)实例数据,本文所用表结构如下:
HR.EMPLOYEES员工表结构如下:
HR.DEPARTMENTS表结构如下:
HR.REGIONS表结构如下:
SQL> DESC HR.REGIONS;
Name Type Nullable Default Comments
----------- ------------ -------- ------- --------
REGION_ID NUMBER
REGION_NAME VARCHAR2(25) Y
Name Type Nullable Default Comments
----------- ------------ -------- ------- --------
REGION_ID NUMBER
REGION_NAME VARCHAR2(25) Y
用SQL完成以下问题列表:
1. 让SELECT TO_CHAR(SALARY,'L99,999.99') FROM HR.EMPLOYEES WHERE ROWNUM < 5 输出结果的货币单位是¥和$。
2. 列出前五位每个员工的名字,工资、涨薪后的的工资(涨幅为8%),以“元”为单位进行四舍五入。
3. 找出谁是最高领导,将名字按大写形式显示。
4. 找出First_Name 为David,Last_Name为Austin 的直接领导名字。
5. First_Name 为Alexander,Last_Name为Hunold领导谁。(谁向David 报告)。
6. 哪些员工的工资高于他直接上司的工资,列出员工的名字和工资,上司的名字和工资。
7. 哪些员工和Chen(LAST_NAME)同部门。
8. 哪些员工跟De Haan(LAST_NAME)做一样职位。
9. 哪些员工跟Hall(LAST_NAME)不在同一个部门。
10. 哪些员工跟William(FIRST_NAME)、Smith(LAST_NAME)做不一样的职位。
11. 显示有提成的员工的信息:名字、提成、所在部门名称、所在地区的名称。
12. 显示Executive部门有哪些职位。
13. 整个公司中,最高工资和最低工资相差多少。
14. 提成大于0 的人数。
15. 显示整个公司的最高工资、最低工资、工资总和、平均工资保留到整数位。
16. 整个公司有多少个领导。
17. 列出在同一部门入职日期晚但工资高于其他同事的员工:名字、工资、入职日期。
2. 列出前五位每个员工的名字,工资、涨薪后的的工资(涨幅为8%),以“元”为单位进行四舍五入。
3. 找出谁是最高领导,将名字按大写形式显示。
4. 找出First_Name 为David,Last_Name为Austin 的直接领导名字。
5. First_Name 为Alexander,Last_Name为Hunold领导谁。(谁向David 报告)。
6. 哪些员工的工资高于他直接上司的工资,列出员工的名字和工资,上司的名字和工资。
7. 哪些员工和Chen(LAST_NAME)同部门。
8. 哪些员工跟De Haan(LAST_NAME)做一样职位。
9. 哪些员工跟Hall(LAST_NAME)不在同一个部门。
10. 哪些员工跟William(FIRST_NAME)、Smith(LAST_NAME)做不一样的职位。
11. 显示有提成的员工的信息:名字、提成、所在部门名称、所在地区的名称。
12. 显示Executive部门有哪些职位。
13. 整个公司中,最高工资和最低工资相差多少。
14. 提成大于0 的人数。
15. 显示整个公司的最高工资、最低工资、工资总和、平均工资保留到整数位。
16. 整个公司有多少个领导。
17. 列出在同一部门入职日期晚但工资高于其他同事的员工:名字、工资、入职日期。
各试题解答如下(欢迎大家指出不同的方法或建议!):
/*--------1、改变NLS_LANG 的值,让SELECT TO_CHAR(SALARY,'L99,999.99') FROM HR.EMPLOYEES WHERE ROWNUM < 5 输出结果的货币单位是¥和$。---------*/
-----在没有设置NLS_LANG的情况下:
SQL> SELECT TO_CHAR(SALARY,'L99,999.99')
2 FROM HR.EMPLOYEES
3 WHERE ROWNUM < 5;
TO_CHAR(SALARY,'L99,999.99')
----------------------------
¥24,000.00
¥20,000.00
¥20,000.00
¥9,000.00
SQL> SELECT TO_CHAR(SALARY,'$99,999.99')
2 FROM HR.EMPLOYEES
3 WHERE ROWNUM < 5;
TO_CHAR(SALARY,'$99,999.99')
----------------------------
$24,000.00
$20,000.00
$20,000.00
$9,000.00
/*--说明:对于'$99,999.99'格式符:
L:表示强制显示当地货币符号
$: 表示显示美元符号
9: 表示一个数字
0: 表示强制0显示
.: 表示一个小数点
,: 表示一个千位分隔符
--------------*/
/*--------2、列出前五位每个员工的名字,工资、涨薪后的的工资(涨幅为8%),以“元”为单位进行四舍五入。---------*/
SQL> SELECT FIRST_NAME,SALARY,ROUND(SALARY * 1.08) FROM HR.EMPLOYEES
2 WHERE ROWNUM <=5;
FIRST_NAME SALARY ROUND(SALARY*1.08)
-------------------- ---------- ------------------
Steven 24000.00 25920
Neena 20000.00 21600
Lex 20000.00 21600
Alexander 9000.00 9720
Bruce 6000.00 6480
/*--------3、找出谁是最高领导,将名字按大写形式显示。---------*/
SQL> SELECT UPPER(FIRST_NAME || ' ' || LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES
3 WHERE MANAGER_ID IS NULL;
NAME
----------------------------------------------
STEVEN KING
/*--------4、找出David 的直接领导的名字。---------*/
SQL> SELECT UPPER(FIRST_NAME ||' ' || LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES
3 WHERE EMPLOYEE_ID IN(
4 SELECT MANAGER_ID FROM HR.EMPLOYEES
5 WHERE FIRST_NAME = 'David' AND LAST_NAME = 'Austin');
NAME
----------------------------------------------
ALEXANDER HUNOLD
--或采用以下方法
SQL> SELECT UPPER( EMP1.FIRST_NAME ||' ' || EMP1.LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES EMP1,HR.EMPLOYEES EMP2
3 WHERE EMP1.EMPLOYEE_ID = EMP2.MANAGER_ID
4 AND EMP2.FIRST_NAME = 'David' AND EMP2.LAST_NAME = 'Austin';
NAME
----------------------------------------------
ALEXANDER HUNOLD
/*--------5、First_Name 为Alexander,LAST_NAME为Hunold领导谁。(谁向David 报告)。---------*/
SQL> SELECT UPPER(FIRST_NAME ||' ' || LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES
3 WHERE MANAGER_ID IN(
4 SELECT EMPLOYEE_ID FROM HR.EMPLOYEES
5 WHERE FIRST_NAME = 'Alexander' AND LAST_NAME = 'Hunold');
NAME
----------------------------------------------
BRUCE ERNST
DAVID AUSTIN
VALLI PATABALLA
DIANA LORENTZ
--或采用以下方法
SQL> SELECT UPPER( EMP1.FIRST_NAME || ' ' || EMP1.LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES EMP1,HR.EMPLOYEES EMP2
3 WHERE EMP1.MANAGER_ID = EMP2.EMPLOYEE_ID
4 AND EMP2.FIRST_NAME = 'Alexander' AND EMP2.LAST_NAME = 'Hunold';
NAME
----------------------------------------------
BRUCE ERNST
DAVID AUSTIN
VALLI PATABALLA
DIANA LORENTZ
/*--------6、哪些员工的工资高于他直接上司的工资,列出员工的名字和工资,上司的名字和工资。---------*/
SQL> SELECT E.FIRST_NAME,E.SALARY,M.FIRST_NAME,M.SALARY
2 FROM EMPLOYEES E,EMPLOYEES M
3 WHERE E.MANAGER_ID = M.EMPLOYEE_ID AND E.SALARY > M.SALARY;
FIRST_NAME SALARY FIRST_NAME SALARY
-------------------- ---------- -------------------- ----------
Lisa 11500.00 Gerald 11000.00
Ellen 11000.00 Eleni 10500.00
--要是只列出员工的名字与工资的话,还可以这样:
SQL> SELECT E.FIRST_NAME,E.SALARY
2 FROM EMPLOYEES E WHERE E.SALARY >
3 (SELECT M.SALARY FROM EMPLOYEES M
4 WHERE E.MANAGER_ID = M.EMPLOYEE_ID);
FIRST_NAME SALARY
-------------------- ----------
Lisa 11500.00
Ellen 11000.00
/*--------7、哪些员工和Chen(LAST_NAME)同部门。---------*/
SQL> SELECT FIRST_NAME FROM EMPLOYEES
2 WHERE DEPARTMENT_ID IN
3 (SELECT DEPARTMENT_ID FROM EMPLOYEES WHERE LAST_NAME = 'Chen')
4 AND LAST_NAME <> 'Chen';
FIRST_NAME
--------------------
Nancy
Daniel
Ismael
Jose Manuel
Luis
--或者--
SQL> SELECT E1.FIRST_NAME FROM EMPLOYEES E1,EMPLOYEES E2
2 WHERE E1.DEPARTMENT_ID = E2.DEPARTMENT_ID
3 AND E2.LAST_NAME = 'Chen' AND E1.LAST_NAME <> 'Chen';
FIRST_NAME
--------------------
Nancy
Daniel
Ismael
Jose Manuel
Luis
/*--------8、哪些员工跟De Haan(LAST_NAME)做一样职位。---------*/
SQL> SELECT FIRST_NAME FROM EMPLOYEES
2 WHERE JOB_ID IN
3 (SELECT JOB_ID FROM EMPLOYEES
4 WHERE LAST_NAME = 'De Haan')
5 AND LAST_NAME <> 'De Haan';
FIRST_NAME
--------------------
Neena
--或者--
SQL> SELECT E1.FIRST_NAME FROM EMPLOYEES E1,EMPLOYEES E2
2 WHERE E1.JOB_ID = E2.JOB_ID
3 AND E2.LAST_NAME = 'De Haan' AND E1.LAST_NAME <> 'De Haan';
FIRST_NAME
--------------------
Neena
/*--------9、哪些员工跟Hall(LAST_NAME)不在同一个部门。---------*/
SQL> SELECT FIRST_NAME || ' ' || LAST_NAME FROM HR.EMPLOYEES
2 WHERE DEPARTMENT_ID NOT IN(
3 SELECT DEPARTMENT_ID FROM HR.EMPLOYEES
4 WHERE LAST_NAME = 'Hall');
FIRST_NAME||''||LAST_NAME
----------------------------------------------
Steven King
Neena Kochhar
Lex De Haan
Alexander Hunold
Bruce Ernst
David Austin
Valli Pataballa
Diana Lorentz
Nancy Greenberg
--...初始有72条数据
--或者:
SQL> SELECT e1.FIRST_NAME FROM EMPLOYEES e1,EMPLOYEES e2
2 WHERE e1.DEPARTMENT_ID = e2.DEPARTMENT_ID(+)
3 and e2.LAST_NAME(+) = 'Hall'
4 and e2.LAST_NAME IS NULL;
/*-------10、哪些员工跟William(FIRST_NAME)、Smith(LAST_NAME)做不一样的职位。--------*/
SQL> SELECT FIRST_NAME || ' ' || LAST_NAME FROM HR.EMPLOYEES
2 WHERE JOB_ID <> (SELECT DISTINCT JOB_ID FROM EMPLOYEES
3 WHERE FIRST_NAME = 'William' AND LAST_NAME = 'Smith');
FIRST_NAME||''||LAST_NAME
----------------------------------------------
Steven King
Neena Kochhar
Lex De Haan
Alexander Hunold
----...初始有77条数据
-----在没有设置NLS_LANG的情况下:
SQL> SELECT TO_CHAR(SALARY,'L99,999.99')
2 FROM HR.EMPLOYEES
3 WHERE ROWNUM < 5;
TO_CHAR(SALARY,'L99,999.99')
----------------------------
¥24,000.00
¥20,000.00
¥20,000.00
¥9,000.00
SQL> SELECT TO_CHAR(SALARY,'$99,999.99')
2 FROM HR.EMPLOYEES
3 WHERE ROWNUM < 5;
TO_CHAR(SALARY,'$99,999.99')
----------------------------
$24,000.00
$20,000.00
$20,000.00
$9,000.00
/*--说明:对于'$99,999.99'格式符:
L:表示强制显示当地货币符号
$: 表示显示美元符号
9: 表示一个数字
0: 表示强制0显示
.: 表示一个小数点
,: 表示一个千位分隔符
--------------*/
/*--------2、列出前五位每个员工的名字,工资、涨薪后的的工资(涨幅为8%),以“元”为单位进行四舍五入。---------*/
SQL> SELECT FIRST_NAME,SALARY,ROUND(SALARY * 1.08) FROM HR.EMPLOYEES
2 WHERE ROWNUM <=5;
FIRST_NAME SALARY ROUND(SALARY*1.08)
-------------------- ---------- ------------------
Steven 24000.00 25920
Neena 20000.00 21600
Lex 20000.00 21600
Alexander 9000.00 9720
Bruce 6000.00 6480
/*--------3、找出谁是最高领导,将名字按大写形式显示。---------*/
SQL> SELECT UPPER(FIRST_NAME || ' ' || LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES
3 WHERE MANAGER_ID IS NULL;
NAME
----------------------------------------------
STEVEN KING
/*--------4、找出David 的直接领导的名字。---------*/
SQL> SELECT UPPER(FIRST_NAME ||' ' || LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES
3 WHERE EMPLOYEE_ID IN(
4 SELECT MANAGER_ID FROM HR.EMPLOYEES
5 WHERE FIRST_NAME = 'David' AND LAST_NAME = 'Austin');
NAME
----------------------------------------------
ALEXANDER HUNOLD
--或采用以下方法
SQL> SELECT UPPER( EMP1.FIRST_NAME ||' ' || EMP1.LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES EMP1,HR.EMPLOYEES EMP2
3 WHERE EMP1.EMPLOYEE_ID = EMP2.MANAGER_ID
4 AND EMP2.FIRST_NAME = 'David' AND EMP2.LAST_NAME = 'Austin';
NAME
----------------------------------------------
ALEXANDER HUNOLD
/*--------5、First_Name 为Alexander,LAST_NAME为Hunold领导谁。(谁向David 报告)。---------*/
SQL> SELECT UPPER(FIRST_NAME ||' ' || LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES
3 WHERE MANAGER_ID IN(
4 SELECT EMPLOYEE_ID FROM HR.EMPLOYEES
5 WHERE FIRST_NAME = 'Alexander' AND LAST_NAME = 'Hunold');
NAME
----------------------------------------------
BRUCE ERNST
DAVID AUSTIN
VALLI PATABALLA
DIANA LORENTZ
--或采用以下方法
SQL> SELECT UPPER( EMP1.FIRST_NAME || ' ' || EMP1.LAST_NAME) AS NAME
2 FROM HR.EMPLOYEES EMP1,HR.EMPLOYEES EMP2
3 WHERE EMP1.MANAGER_ID = EMP2.EMPLOYEE_ID
4 AND EMP2.FIRST_NAME = 'Alexander' AND EMP2.LAST_NAME = 'Hunold';
NAME
----------------------------------------------
BRUCE ERNST
DAVID AUSTIN
VALLI PATABALLA
DIANA LORENTZ
/*--------6、哪些员工的工资高于他直接上司的工资,列出员工的名字和工资,上司的名字和工资。---------*/
SQL> SELECT E.FIRST_NAME,E.SALARY,M.FIRST_NAME,M.SALARY
2 FROM EMPLOYEES E,EMPLOYEES M
3 WHERE E.MANAGER_ID = M.EMPLOYEE_ID AND E.SALARY > M.SALARY;
FIRST_NAME SALARY FIRST_NAME SALARY
-------------------- ---------- -------------------- ----------
Lisa 11500.00 Gerald 11000.00
Ellen 11000.00 Eleni 10500.00
--要是只列出员工的名字与工资的话,还可以这样:
SQL> SELECT E.FIRST_NAME,E.SALARY
2 FROM EMPLOYEES E WHERE E.SALARY >
3 (SELECT M.SALARY FROM EMPLOYEES M
4 WHERE E.MANAGER_ID = M.EMPLOYEE_ID);
FIRST_NAME SALARY
-------------------- ----------
Lisa 11500.00
Ellen 11000.00
/*--------7、哪些员工和Chen(LAST_NAME)同部门。---------*/
SQL> SELECT FIRST_NAME FROM EMPLOYEES
2 WHERE DEPARTMENT_ID IN
3 (SELECT DEPARTMENT_ID FROM EMPLOYEES WHERE LAST_NAME = 'Chen')
4 AND LAST_NAME <> 'Chen';
FIRST_NAME
--------------------
Nancy
Daniel
Ismael
Jose Manuel
Luis
--或者--
SQL> SELECT E1.FIRST_NAME FROM EMPLOYEES E1,EMPLOYEES E2
2 WHERE E1.DEPARTMENT_ID = E2.DEPARTMENT_ID
3 AND E2.LAST_NAME = 'Chen' AND E1.LAST_NAME <> 'Chen';
FIRST_NAME
--------------------
Nancy
Daniel
Ismael
Jose Manuel
Luis
/*--------8、哪些员工跟De Haan(LAST_NAME)做一样职位。---------*/
SQL> SELECT FIRST_NAME FROM EMPLOYEES
2 WHERE JOB_ID IN
3 (SELECT JOB_ID FROM EMPLOYEES
4 WHERE LAST_NAME = 'De Haan')
5 AND LAST_NAME <> 'De Haan';
FIRST_NAME
--------------------
Neena
--或者--
SQL> SELECT E1.FIRST_NAME FROM EMPLOYEES E1,EMPLOYEES E2
2 WHERE E1.JOB_ID = E2.JOB_ID
3 AND E2.LAST_NAME = 'De Haan' AND E1.LAST_NAME <> 'De Haan';
FIRST_NAME
--------------------
Neena
/*--------9、哪些员工跟Hall(LAST_NAME)不在同一个部门。---------*/
SQL> SELECT FIRST_NAME || ' ' || LAST_NAME FROM HR.EMPLOYEES
2 WHERE DEPARTMENT_ID NOT IN(
3 SELECT DEPARTMENT_ID FROM HR.EMPLOYEES
4 WHERE LAST_NAME = 'Hall');
FIRST_NAME||''||LAST_NAME
----------------------------------------------
Steven King
Neena Kochhar
Lex De Haan
Alexander Hunold
Bruce Ernst
David Austin
Valli Pataballa
Diana Lorentz
Nancy Greenberg
--...初始有72条数据
--或者:
SQL> SELECT e1.FIRST_NAME FROM EMPLOYEES e1,EMPLOYEES e2
2 WHERE e1.DEPARTMENT_ID = e2.DEPARTMENT_ID(+)
3 and e2.LAST_NAME(+) = 'Hall'
4 and e2.LAST_NAME IS NULL;
/*-------10、哪些员工跟William(FIRST_NAME)、Smith(LAST_NAME)做不一样的职位。--------*/
SQL> SELECT FIRST_NAME || ' ' || LAST_NAME FROM HR.EMPLOYEES
2 WHERE JOB_ID <> (SELECT DISTINCT JOB_ID FROM EMPLOYEES
3 WHERE FIRST_NAME = 'William' AND LAST_NAME = 'Smith');
FIRST_NAME||''||LAST_NAME
----------------------------------------------
Steven King
Neena Kochhar
Lex De Haan
Alexander Hunold
----...初始有77条数据
/*--------11、显示有提成的员工的信息:名字、提成、所在部门名称、所在地区的名称。---------*/
SQL> SELECT E.FIRST_NAME || ' ' || E.LAST_NAME AS NAME,
2 E.COMMISSION_PCT,D.DEPARTMENT_NAME,L.CITY
3 FROM HR.EMPLOYEES E,HR.DEPARTMENTS D,HR.LOCATIONS L
4 WHERE E.DEPARTMENT_ID = D.DEPARTMENT_ID
5 AND D.LOCATION_ID = L.LOCATION_ID
6 AND E.COMMISSION_PCT IS NOT NULL;
/*--------12、显示Executive部门有哪些职位。---------*/
SQL> SELECT DISTINCT E.JOB_ID FROM HR.EMPLOYEES E,HR.DEPARTMENTS D
2 WHERE D.DEPARTMENT_ID = E.DEPARTMENT_ID
3 AND D.DEPARTMENT_NAME = 'Executive';
JOB_ID
----------
AD_PRES
AD_VP
/*--------13、整个公司中,最高工资和最低工资相差多少。---------*/
SQL> SELECT MAX(SALARY) - MIN(SALARY) FROM HR.EMPLOYEES;
MAX(SALARY)-MIN(SALARY)
-----------------------
21900
/*--------14、提成大于0 的人数。---------*/
SQL> SELECT COUNT(*) AS 提成大小0的人数 FROM HR.EMPLOYEES
2 WHERE COMMISSION_PCT > 0;
提成大小0的人数
---------------
35
--或者
SQL> SELECT COUNT(COMMISSION_PCT) AS 提成大小0的人数
2 FROM HR.EMPLOYEES
3 WHERE COMMISSION_PCT > 0;
提成大小0的人数
---------------
35
/*--------15、显示整个公司的最高工资、最低工资、工资总和、平均工资保留到整数位。---------*/
SQL> SELECT MAX(NVL(SALARY,0)) AS 最高工资,
2 MIN(NVL(SALARY,0)) AS 最低工资,
3 SUM(NVL(SALARY,0)) AS 工资总和,
4 ROUND(AVG(NVL(SALARY,0))) AS 平均工资
5 FROM HR.EMPLOYEES;
最高工资 最低工资 工资总和 平均工资
---------- ---------- ---------- ---------
24000 2100 698011 6523
/*--------16、整个公司有多少个领导。---------*/
SQL> SELECT COUNT(DISTINCT(MANAGER_ID)) FROM HR.EMPLOYEES
2 WHERE MANAGER_ID IS NOT NULL;
COUNT(DISTINCT(MANAGER_ID))
---------------------------
18
/*--------17、列出在同一部门入职日期晚但工资高于其他同事的员工:
名字、工资、入职日期。---------*/
SQL> SELECT DISTINCT E1.FIRST_NAME || ' ' || E1.LAST_NAME AS 姓名,
2 E1.SALARY AS 工资,E1.HIRE_DATE AS 入职日期
3 FROM HR.EMPLOYEES E1,HR.EMPLOYEES E2
4 WHERE E1.DEPARTMENT_ID = E2.DEPARTMENT_ID
5 AND E1.HIRE_DATE > E2.HIRE_DATE
6 AND E1.SALARY > E2.SALARY
7 ORDER BY 工资 DESC;
姓名 工资 入职日期
---------------------------------------------- ---------- -----------
John Russell 14000.00 1996-10-1
Karen Partners 13500.00 1997-1-5
Alberto Errazuriz 12000.00 1997-3-10
Nancy Greenberg 12000.00 1994-8-17
Lisa Ozer 11500.00 1997-3-11
Ellen Abel 11000.00 1996-5-11
Gerald Cambrault 11000.00 1999-10-15
Clara Vishney 10500.00 1997-11-11
Eleni Zlotkey 10500.00 2000-1-29
Harrison Bloom 10000.00 1998-3-23
Peter Tucker 10000.00 1997-1-30
Tayler Fox 9600.00 1998-1-24
Danielle Greene 9500.00 1999-3-19
David Bernstein 9500.00 1997-3-24
Peter Hall 9000.00 1997-8-20
Alyssa Hutton 8800.00 1997-3-19
Jonathon Taylor 8600.00 1998-3-24
Adam Fripp 8200.00 1997-4-10
Christopher Olsen 8000.00 1998-3-30
Jack Livingston 8000.00 1998-4-23
Matthew Weiss 8000.00 1996-7-18
Jose Manuel Urman 7800.00 1998-3-7
Nanette Cambrault 7500.00 1998-12-9
William Smith 7400.00 1999-2-23
Elizabeth Bates 7300.00 1999-3-24
Charles Johnson 7211.00 2000-1-4
Mattea Marvins 7200.00 2000-1-24
Shanta Vollman 6500.00 1997-10-10
Kevin Mourgos 5800.00 1999-11-16
Nandita Sarchand 4200.00 1996-1-27
Alexis Bull 4100.00 1997-2-20
Sarah Bell 4000.00 1996-2-4
Britney Everett 3900.00 1997-3-3
Kelly Chung 3800.00 1997-6-14
Jennifer Dilly 3600.00 1997-8-13
Julia Dellinger 3400.00 1998-6-24
Laura Bissot 3300.00 1997-8-20
Julia Nayer 3200.00 1997-7-16
Samuel McCain 3200.00 1998-7-1
Stephen Stiles 3200.00 1997-10-26
Winston Taylor 3200.00 1998-1-24
Alana Walsh 3100.00 1998-4-24
Jean Fleaur 3100.00 1998-2-23
Anthony Cabrio 3000.00 1999-2-7
Kevin Feeney 3000.00 1998-5-23
Michael Rogers 2900.00 1998-8-26
Shelli Baida 2900.00 1997-12-24
Timothy Gates 2900.00 1998-7-11
Girard Geoni 2800.00 2000-2-3
Mozhe Atkinson 2800.00 1997-10-30
Vance Jones 2800.00 1999-3-17
Irene Mikkilineni 2700.00 1998-9-28
John Seo 2700.00 1998-2-12
Donald OConnell 2600.00 1999-6-21
Douglas Grant 2600.00 2000-1-13
Randall Matos 2600.00 1998-3-15
Martha Sullivan 2500.00 1999-6-21
Randall Perkins 2500.00 1999-12-19
Ki Gee 2400.00 1999-12-12
Hazel Philtanker 2200.00 2000-2-6
Steven Markle 2200.00 2000-3-8
61 rows selected
SQL> SELECT E.FIRST_NAME || ' ' || E.LAST_NAME AS NAME,
2 E.COMMISSION_PCT,D.DEPARTMENT_NAME,L.CITY
3 FROM HR.EMPLOYEES E,HR.DEPARTMENTS D,HR.LOCATIONS L
4 WHERE E.DEPARTMENT_ID = D.DEPARTMENT_ID
5 AND D.LOCATION_ID = L.LOCATION_ID
6 AND E.COMMISSION_PCT IS NOT NULL;
/*--------12、显示Executive部门有哪些职位。---------*/
SQL> SELECT DISTINCT E.JOB_ID FROM HR.EMPLOYEES E,HR.DEPARTMENTS D
2 WHERE D.DEPARTMENT_ID = E.DEPARTMENT_ID
3 AND D.DEPARTMENT_NAME = 'Executive';
JOB_ID
----------
AD_PRES
AD_VP
/*--------13、整个公司中,最高工资和最低工资相差多少。---------*/
SQL> SELECT MAX(SALARY) - MIN(SALARY) FROM HR.EMPLOYEES;
MAX(SALARY)-MIN(SALARY)
-----------------------
21900
/*--------14、提成大于0 的人数。---------*/
SQL> SELECT COUNT(*) AS 提成大小0的人数 FROM HR.EMPLOYEES
2 WHERE COMMISSION_PCT > 0;
提成大小0的人数
---------------
35
--或者
SQL> SELECT COUNT(COMMISSION_PCT) AS 提成大小0的人数
2 FROM HR.EMPLOYEES
3 WHERE COMMISSION_PCT > 0;
提成大小0的人数
---------------
35
/*--------15、显示整个公司的最高工资、最低工资、工资总和、平均工资保留到整数位。---------*/
SQL> SELECT MAX(NVL(SALARY,0)) AS 最高工资,
2 MIN(NVL(SALARY,0)) AS 最低工资,
3 SUM(NVL(SALARY,0)) AS 工资总和,
4 ROUND(AVG(NVL(SALARY,0))) AS 平均工资
5 FROM HR.EMPLOYEES;
最高工资 最低工资 工资总和 平均工资
---------- ---------- ---------- ---------
24000 2100 698011 6523
/*--------16、整个公司有多少个领导。---------*/
SQL> SELECT COUNT(DISTINCT(MANAGER_ID)) FROM HR.EMPLOYEES
2 WHERE MANAGER_ID IS NOT NULL;
COUNT(DISTINCT(MANAGER_ID))
---------------------------
18
/*--------17、列出在同一部门入职日期晚但工资高于其他同事的员工:
名字、工资、入职日期。---------*/
SQL> SELECT DISTINCT E1.FIRST_NAME || ' ' || E1.LAST_NAME AS 姓名,
2 E1.SALARY AS 工资,E1.HIRE_DATE AS 入职日期
3 FROM HR.EMPLOYEES E1,HR.EMPLOYEES E2
4 WHERE E1.DEPARTMENT_ID = E2.DEPARTMENT_ID
5 AND E1.HIRE_DATE > E2.HIRE_DATE
6 AND E1.SALARY > E2.SALARY
7 ORDER BY 工资 DESC;
姓名 工资 入职日期
---------------------------------------------- ---------- -----------
John Russell 14000.00 1996-10-1
Karen Partners 13500.00 1997-1-5
Alberto Errazuriz 12000.00 1997-3-10
Nancy Greenberg 12000.00 1994-8-17
Lisa Ozer 11500.00 1997-3-11
Ellen Abel 11000.00 1996-5-11
Gerald Cambrault 11000.00 1999-10-15
Clara Vishney 10500.00 1997-11-11
Eleni Zlotkey 10500.00 2000-1-29
Harrison Bloom 10000.00 1998-3-23
Peter Tucker 10000.00 1997-1-30
Tayler Fox 9600.00 1998-1-24
Danielle Greene 9500.00 1999-3-19
David Bernstein 9500.00 1997-3-24
Peter Hall 9000.00 1997-8-20
Alyssa Hutton 8800.00 1997-3-19
Jonathon Taylor 8600.00 1998-3-24
Adam Fripp 8200.00 1997-4-10
Christopher Olsen 8000.00 1998-3-30
Jack Livingston 8000.00 1998-4-23
Matthew Weiss 8000.00 1996-7-18
Jose Manuel Urman 7800.00 1998-3-7
Nanette Cambrault 7500.00 1998-12-9
William Smith 7400.00 1999-2-23
Elizabeth Bates 7300.00 1999-3-24
Charles Johnson 7211.00 2000-1-4
Mattea Marvins 7200.00 2000-1-24
Shanta Vollman 6500.00 1997-10-10
Kevin Mourgos 5800.00 1999-11-16
Nandita Sarchand 4200.00 1996-1-27
Alexis Bull 4100.00 1997-2-20
Sarah Bell 4000.00 1996-2-4
Britney Everett 3900.00 1997-3-3
Kelly Chung 3800.00 1997-6-14
Jennifer Dilly 3600.00 1997-8-13
Julia Dellinger 3400.00 1998-6-24
Laura Bissot 3300.00 1997-8-20
Julia Nayer 3200.00 1997-7-16
Samuel McCain 3200.00 1998-7-1
Stephen Stiles 3200.00 1997-10-26
Winston Taylor 3200.00 1998-1-24
Alana Walsh 3100.00 1998-4-24
Jean Fleaur 3100.00 1998-2-23
Anthony Cabrio 3000.00 1999-2-7
Kevin Feeney 3000.00 1998-5-23
Michael Rogers 2900.00 1998-8-26
Shelli Baida 2900.00 1997-12-24
Timothy Gates 2900.00 1998-7-11
Girard Geoni 2800.00 2000-2-3
Mozhe Atkinson 2800.00 1997-10-30
Vance Jones 2800.00 1999-3-17
Irene Mikkilineni 2700.00 1998-9-28
John Seo 2700.00 1998-2-12
Donald OConnell 2600.00 1999-6-21
Douglas Grant 2600.00 2000-1-13
Randall Matos 2600.00 1998-3-15
Martha Sullivan 2500.00 1999-6-21
Randall Perkins 2500.00 1999-12-19
Ki Gee 2400.00 1999-12-12
Hazel Philtanker 2200.00 2000-2-6
Steven Markle 2200.00 2000-3-8
61 rows selected