Find the numbers that has not been used as DEPTNO in the DEPT table.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Find the numbers that has not been used as DEPTNO in the DEPT table.

### Employee Data Table

The table displayed is a sample dataset representing employee information in an organization. Below is a detailed explanation of each column and the data it contains:

1. **EMPNO (Employee Number)**: A unique identifier for each employee.
   - 7839
   - 7566

2. **ENAME (Employee Name)**: The name of the employee.
   - KING
   - JONES

3. **JOB (Job Title)**: The position or title of the employee within the organization.
   - PRESIDENT
   - MANAGER

4. **MGR (Manager ID)**: The employee number of the employee's manager. If `(null)`, it indicates the person does not report to a higher manager.
   - KING: (null)
   - JONES: 7839

5. **HIREDATE (Hire Date)**: The date the employee was hired.
   - KING: 17-NOV-81
   - JONES: 02-APR-81

6. **SAL (Salary)**: The salary of the employee.
   - KING: 5000
   - JONES: 2975

7. **COMM (Commission)**: The commission earned by the employee. This field may be `(null)` if the employee does not earn a commission.
   - Both entries are (null)

8. **DEPTNO (Department Number)**: The department to which the employee belongs.
   - KING: 10
   - JONES: 20

This table serves as an educational resource for understanding how employee details can be structured and retrieved in database systems. Each row represents a unique employee, and each column provides specific information about the employee's status and role within the organization.
Transcribed Image Text:### Employee Data Table The table displayed is a sample dataset representing employee information in an organization. Below is a detailed explanation of each column and the data it contains: 1. **EMPNO (Employee Number)**: A unique identifier for each employee. - 7839 - 7566 2. **ENAME (Employee Name)**: The name of the employee. - KING - JONES 3. **JOB (Job Title)**: The position or title of the employee within the organization. - PRESIDENT - MANAGER 4. **MGR (Manager ID)**: The employee number of the employee's manager. If `(null)`, it indicates the person does not report to a higher manager. - KING: (null) - JONES: 7839 5. **HIREDATE (Hire Date)**: The date the employee was hired. - KING: 17-NOV-81 - JONES: 02-APR-81 6. **SAL (Salary)**: The salary of the employee. - KING: 5000 - JONES: 2975 7. **COMM (Commission)**: The commission earned by the employee. This field may be `(null)` if the employee does not earn a commission. - Both entries are (null) 8. **DEPTNO (Department Number)**: The department to which the employee belongs. - KING: 10 - JONES: 20 This table serves as an educational resource for understanding how employee details can be structured and retrieved in database systems. Each row represents a unique employee, and each column provides specific information about the employee's status and role within the organization.
The image appears to be a table displaying information about different departments within a company. Here is a transcription of the table:

| DEPTNO | DNAME      | LOC      |
|--------|------------|----------|
| 10     | ACCOUNTING | NEW YORK |
| 20     | RESEARCH   | DALLAS   |
| 30     | SALES      | CHICAGO  |
| 40     | OPERATIONS | BOSTON   |

### Explanation:

1. **DEPTNO**: This column represents the unique department number assigned to each department.
   - 10 for Accounting
   - 20 for Research
   - 30 for Sales
   - 40 for Operations

2. **DNAME**: This column lists the name of each department.
   - ACCOUNTING
   - RESEARCH
   - SALES
   - OPERATIONS

3. **LOC**: This column denotes the location of each department within the company.
   - NEW YORK for Accounting
   - DALLAS for Research
   - CHICAGO for Sales
   - BOSTON for Operations

This table is useful for easily identifying the departments, their unique numbers, and locations within an organization.
Transcribed Image Text:The image appears to be a table displaying information about different departments within a company. Here is a transcription of the table: | DEPTNO | DNAME | LOC | |--------|------------|----------| | 10 | ACCOUNTING | NEW YORK | | 20 | RESEARCH | DALLAS | | 30 | SALES | CHICAGO | | 40 | OPERATIONS | BOSTON | ### Explanation: 1. **DEPTNO**: This column represents the unique department number assigned to each department. - 10 for Accounting - 20 for Research - 30 for Sales - 40 for Operations 2. **DNAME**: This column lists the name of each department. - ACCOUNTING - RESEARCH - SALES - OPERATIONS 3. **LOC**: This column denotes the location of each department within the company. - NEW YORK for Accounting - DALLAS for Research - CHICAGO for Sales - BOSTON for Operations This table is useful for easily identifying the departments, their unique numbers, and locations within an organization.
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