ORACLE自带的人力资源(HR)实例数据,本文所用表结构如下:

表名:REGIONS

序号

列名

数据类型

长度

小数位

标识

主键

允许空

默认值

说明

1

REGION_ID

NUMBER

 

 

 

 

 

2

REGION_NAME

VARCHAR2

25

 

 

 

 

 

 

表名:COUNTRIES

序号

列名

数据类型

长度

小数位

标识

主键

允许空

默认值

说明

1

COUNTRY_ID

CHAR

2

 

 

 

 

2

COUNTRY_NAME

VARCHAR2

40

 

 

 

 

 

3

REGION_ID

NUMBER

 

 

 

 

 

 

表名:LOCATIONS

序号

列名

数据类型

长度

小数位

标识

主键

允许空

默认值

说明

1

LOCATION_ID

NUMBER

4

0

 

 

 

2

STREET_ADDRESS

VARCHAR2

40

 

 

 

 

 

3

POSTAL_CODE

VARCHAR2

12

 

 

 

 

 

4

CITY

VARCHAR2

30

 

 

 

 

 

5

STATE_PROVINCE

VARCHAR2

25

 

 

 

 

 

6

COUNTRY_ID

CHAR

2

 

 

 

 

 

表名:DEPARTMENTS

序号

列名

数据类型

长度

小数位

标识

主键

允许空

默认值

说明

1

DEPARTMENT_ID

NUMBER

4

0

 

 

 

2

DEPARTMENT_NAME

VARCHAR2

30

 

 

 

 

 

3

MANAGER_ID

NUMBER

6

0

 

 

 

 

4

LOCATION_ID

NUMBER

4

0

 

 

 

 

表名:JOBS

序号

列名

数据类型

长度

小数位

标识

主键

允许空

默认值

说明

1

JOB_ID

VARCHAR2

10

 

 

 

 

2

JOB_TITLE

VARCHAR2

35

 

 

 

 

 

3

MIN_SALARY

NUMBER

6

0

 

 

 

 

4

MAX_SALARY

NUMBER

6

0

 

 

 

 

表名:EMPLOYEES

序号

列名

数据类型

长度

小数位

标识

主键

允许空

默认值

说明

1

EMPLOYEE_ID

NUMBER

6

0

 

 

 

2

FIRST_NAME

VARCHAR2

20

 

 

 

 

 

3

LAST_NAME

VARCHAR2

25

 

 

 

 

 

4

EMAIL

VARCHAR2

25

 

 

 

 

 

5

PHONE_NUMBER

VARCHAR2

20

 

 

 

 

 

6

HIRE_DATE

DATE

7

 

 

 

 

 

7

JOB_ID

VARCHAR2

10

 

 

 

 

 

8

SALARY

NUMBER

8

2

 

 

 

 

9

COMMISSION_PCT

NUMBER

2

2

 

 

 

 

10

MANAGER_ID

NUMBER

6

0

 

 

 

 

11

DEPARTMENT_ID

NUMBER

4

0

 

 

 

 

ER图:

ORACLE SQL:经典查询练手第五篇_ORACLE SQL

 

SQL完成以下问题列表:

 

1. 哪些部门的人数比90 号部门的人数多。
2. Den(FIRST_NAME)、Raphaely(LAST_NAME)的领导是谁(非关联子查询)。
3. Den(FIRST_NAME)、Raphaely(LAST_NAME) 领导谁(非关联子查询)。
4. Den(FIRST_NAME)、Raphaely(LAST_NAME) 的领导是谁(关联子查询)。
5. Den(FIRST_NAME)、Raphaely(LAST_NAME) 领导谁(关联子查询)。
6. 列出在同一部门共事,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
(关联子查询)。
7. 哪些员工跟Den(FIRST_NAME)、Raphaely(LAST_NAME)不在同一个部门(非关联子查询)。
8. 哪些员工跟Den(FIRST_NAME)、Raphaely(LAST_NAME)不在同一个部门(关联子查询)。
9.  Finance部门有哪些职位(非关联子查询)。
10. Finance部门有哪些职位(关联子查询)。

 

 

/*--------1、哪些部门的人数比90号部门的人数多。---------*/

SQL
> SELECT DEPARTMENT_ID,COUNT(*) FROM EMPLOYEES
  
2  GROUP BY DEPARTMENT_ID
  
3  HAVING COUNT(*) >
  
4         (SELECT COUNT(*) FROM EMPLOYEES
  
5          WHERE DEPARTMENT_ID = 90
  
6         );
 
DEPARTMENT_ID  
COUNT(*)
------------- ----------
           30          6
          
50         45
          
60          5
          
80         34
         
100          6

/*-------2、Den(FIRST_NAME)、Raphaely(LAST_NAME)的
领导是谁(非关联子查询)。---------
*/

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
  
2  FROM EMPLOYEES
  
3  WHERE EMPLOYEE_ID = 
  
4        (SELECT MANAGER_ID FROM EMPLOYEES
  
5         WHERE FIRST_NAME = 'Den'
  
6         AND   LAST_NAME  = 'Raphaely'
  
7        );
 
FIRST_NAME
||''||LAST_NAME
----------------------------------------------
Steven King

/*-------3、Den(FIRST_NAME)、Raphaely(LAST_NAME)领导谁(非关联子查询)。---------*/

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
  
2  FROM EMPLOYEES
  
3  WHERE MANAGER_ID IN
  
4        (SELECT EMPLOYEE_ID FROM EMPLOYEES
  
5         WHERE FIRST_NAME = 'Den'
  
6         AND   LAST_NAME  = 'Raphaely'
  
7        );
 
FIRST_NAME
||''||LAST_NAME
----------------------------------------------
Alexander Khoo
Shelli Baida
Sigal Tobias
Guy Himuro
Karen Colmenares

--或者

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
  
2  FROM EMPLOYEES
  
3  WHERE MANAGER_ID =
  
4        (SELECT EMPLOYEE_ID FROM EMPLOYEES
  
5         WHERE FIRST_NAME = 'Den'
  
6         AND   LAST_NAME  = 'Raphaely'
  
7        );
 
FIRST_NAME
||''||LAST_NAME
----------------------------------------------
Alexander Khoo
Shelli Baida
Sigal Tobias
Guy Himuro
Karen Colmenares

/*-------4、Den(FIRST_NAME)、Raphaely(LAST_NAME)的领导是谁(关联子查询)。---------*/

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
  
2  FROM EMPLOYEES EMP1
  
3  WHERE EXISTS (
  
4        SELECT 1 FROM EMPLOYEES EMP2
  
5        WHERE FIRST_NAME = 'Den'
  
6        AND LAST_NAME  = 'Raphaely'
  
7        AND EMP2.MANAGER_ID = EMP1.EMPLOYEE_ID);
 
FIRST_NAME
||''||LAST_NAME
----------------------------------------------
Steven King

/*-------5、Den(FIRST_NAME)、Raphaely(LAST_NAME)领导谁(关联子查询)。---------*/

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
  
2  FROM EMPLOYEES EMP1
  
3  WHERE EXISTS (
  
4        SELECT 1 FROM EMPLOYEES EMP2
  
5        WHERE FIRST_NAME = 'Den'
  
6        AND LAST_NAME  = 'Raphaely'
  
7        AND EMP2.EMPLOYEE_ID = EMP1.MANAGER_ID); 

FIRST_NAME
||''||LAST_NAME
----------------------------------------------
Alexander Khoo
Shelli Baida
Sigal Tobias
Guy Himuro
Karen Colmenares

 

/*-------6、列出在同一部门共事,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(关联子查询)。---------
*/

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME AS 姓名,
  
2          SALARY AS 工资,HIRE_DATE AS 入职日期
  
3  FROM EMPLOYEES EMP1
  
4  WHERE EXISTS (
  
5        SELECT 1 FROM EMPLOYEES EMP2
  
6        WHERE EMP2.DEPARTMENT_ID = EMP1.DEPARTMENT_ID
 
7        AND   EMP1.HIRE_DATE > EMP2.HIRE_DATE
  
8        AND   EMP1.SALARY    > EMP2.SALARY
 
9        );

姓名                                                   工资 入职日期
---------------------------------------------- ---------- -----------
Nancy Greenberg                                  12000.00 1994-8-17
Jose Manuel Urman                                
7800.00 1998-3-7
Shelli Baida                                     
2900.00 1997-12-24
Adam Fripp                                       
8200.00 1997-4-10
Matthew Weiss                                    
8000.00 1996-7-18
Jennifer Dilly                                   
3600.00 1997-8-13
Julia Dellinger                                  
3400.00 1998-6-24
Laura Bissot                                     
3300.00 1997-8-20
Kevin Mourgos                                    
5800.00 1999-11-16
Shanta Vollman                                   
6500.00 1997-10-10
Vance Jones                                      
2800.00 1999-3-17
Anthony Cabrio                                   
3000.00 1999-2-7
Girard Geoni                                     
2800.00 2000-2-3
Douglas
Grant                                     2600.00 2000-1-13
Donald OConnell                                  
2600.00 1999-6-21
Randall Perkins                                  
2500.00 1999-12-19
Martha Sullivan                                  
2500.00 1999-6-21
Kevin Feeney                                     
3000.00 1998-5-23
Alana Walsh                                      
3100.00 1998-4-24
Samuel McCain                                    
3200.00 1998-7-1
Timothy Gates                                    
2900.00 1998-7-11
Jean Fleaur                                      
3100.00 1998-2-23
Winston Taylor                                   
3200.00 1998-1-24
Michael Rogers                                   
2900.00 1998-8-26
Britney Everett                                  
3900.00 1997-3-3
Kelly Chung                                      
3800.00 1997-6-14
Alexis Bull                                      
4100.00 1997-2-20
Randall Matos                                    
2600.00 1998-3-15
John Seo                                         
2700.00 1998-2-12
Stephen Stiles                                   
3200.00 1997-10-26
Mozhe Atkinson                                   
2800.00 1997-10-30
Irene Mikkilineni                                
2700.00 1998-9-28
Julia Nayer                                      
3200.00 1997-7-16
Hazel Philtanker                                 
2200.00 2000-2-6
Ki Gee                                           
2400.00 1999-12-12
Steven Markle                                    
2200.00 2000-3-8
Sarah Bell                                       
4000.00 1996-2-4
Nandita Sarchand                                 
4200.00 1996-1-27
Lisa Ozer                                       
11500.00 1997-3-11
Clara Vishney                                   
10500.00 1997-11-11
Eleni Zlotkey                                   
10500.00 2000-1-29 
Gerald Cambrault                                
11000.00 1999-10-15
Alberto Errazuriz                               
12000.00 1997-3-10
Tayler Fox                                       
9600.00 1998-1-24
Harrison Bloom                                  
10000.00 1998-3-23
Danielle Greene                                  
9500.00 1999-3-19
Charles Johnson                                  
7211.00 2000-1-4
Mattea Marvins                                   
7200.00 2000-1-24
Ellen Abel                                      
11000.00 1996-5-11
Karen Partners                                  
13500.00 1997-1-5
John Russell                                    
14000.00 1996-10-1
Peter Tucker                                    
10000.00 1997-1-30
David Bernstein                                  
9500.00 1997-3-24
Jonathon Taylor                                  
8600.00 1998-3-24
Alyssa Hutton                                    
8800.00 1997-3-19
Peter Hall                                       
9000.00 1997-8-20
Jack Livingston                                  
8000.00 1998-4-23
Christopher Olsen                                
8000.00 1998-3-30
Elizabeth Bates                                  
7300.00 1999-3-24
William Smith                                    
7400.00 1999-2-23
Nanette Cambrault                                
7500.00 1998-12-9
 
61 rows selected

/*-------7、哪些员工跟Den(FIRST_NAME)、Raphaely(LAST_NAME)
不在同一个部门(非关联子查询)。---------
*/

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
 
2  FROM EMPLOYEES
  
3  WHERE DEPARTMENT_ID <>
 
4        (SELECT DEPARTMENT_ID FROM EMPLOYEES
  
5         WHERE FIRST_NAME = 'Den'
 
6         AND LAST_NAME  = 'Raphaely'
 
7        );
 
FIRST_NAME
||''||LAST_NAME
----------------------------------------------
Steven King
Neena Kochhar
Lex De Haan
Alexander Hunold
Bruce Ernst
David Austin
Valli Pataballa
--等等

--或者

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
  
2  FROM EMPLOYEES
  
3  WHERE DEPARTMENT_ID NOT IN
  
4        (SELECT DEPARTMENT_ID FROM EMPLOYEES
  
5         WHERE FIRST_NAME = 'Den'
  
6         AND LAST_NAME  = 'Raphaely'
  
7        );

/*-------8、哪些员工跟Den(FIRST_NAME)、Raphaely(LAST_NAME)
不在同一个部门(关联子查询)。---------
*/

SQL
> SELECT FIRST_NAME || ' ' || LAST_NAME
  
2  FROM EMPLOYEES EMP1
  
3  WHERE NOT EXISTS (
  
4        SELECT 1 FROM EMPLOYEES EMP2
  
5        WHERE EMP1.DEPARTMENT_ID = EMP2.DEPARTMENT_ID
  
6        AND EMP2.FIRST_NAME =  'Den'
  
7        AND EMP2.LAST_NAME  =  'Raphaely');
 
FIRST_NAME
||''||LAST_NAME
----------------------------------------------
Kimberely Grant
Lex De Haan
Neena Kochhar
Steven King
Pat Fay
Michael Hartstein
Diana Lorentz
Valli Pataballa
--等等

/*-------9、Finance部门有哪些职位(非关联子查询)。---------*/

SQL
> SELECT DISTINCT JOB_ID FROM EMPLOYEES
  
2  WHERE DEPARTMENT_ID = (
  
3        SELECT DEPARTMENT_ID FROM DEPARTMENTS
  
4        WHERE DEPARTMENT_NAME = 'Finance');
 
JOB_ID
----------
FI_ACCOUNT
FI_MGR

--或者

SQL
> SELECT DISTINCT JOB_ID FROM EMPLOYEES
  
2  WHERE DEPARTMENT_ID IN (
  
3        SELECT DEPARTMENT_ID FROM DEPARTMENTS
  
4        WHERE DEPARTMENT_NAME = 'Finance');
 
JOB_ID
----------
FI_ACCOUNT
FI_MGR


/*-------10、Finance部门有哪些职位(关联子查询)。---------*/
SQL
> SELECT DISTINCT JOB_ID FROM EMPLOYEES
  
2  WHERE EXISTS(
  
3        SELECT 1 FROM DEPARTMENTS
  
4        WHERE EMPLOYEES.DEPARTMENT_ID = DEPARTMENTS.DEPARTMENT_ID
  
5        AND DEPARTMENTS.DEPARTMENT_NAME = 'Finance');
 
JOB_ID
----------
FI_ACCOUNT
FI_MGR