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Delete all the employees in the department that has less than 3 employees using sql

Delete all the employees in the department that has less than 3 employees using sql

Database System Concepts
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
Problem 1PE
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Delete all the employees in the department that has less than 3 employees

using sql

### Employee Details Table This table presents a dataset related to employees, including their roles, managers, and other key details. Below is a breakdown of each column and the data it contains. | **EMPNO** | **ENAME** | **JOB** | **MGR** | **HIREDATE** | **SAL** | **COMM** | **DEPTNO** | |-----------|-----------|--------------|---------|--------------|---------|----------|------------| | 7839 | KING | PRESIDENT | (null) | 17-NOV-81 | 5000 | (null) | 10 | | 7566 | JONES | MANAGER | 7839 | 02-APR-81 | 2975 | (null) | 20 | | 7902 | FORD | ANALYST | 7566 | 03-DEC-81 | 3000 | (null) | 20 | #### Column Explanation: - **EMPNO**: Employee Number, a unique identifier for each employee. - **ENAME**: Employee Name. - **JOB**: Job Title of the employee. - **MGR**: Manager's Employee Number, indicating who manages the employee. A `(null)` value indicates no manager. - **HIREDATE**: Date the employee was hired. - **SAL**: Salary of the employee. - **COMM**: Commission, if any, received by the employee. A `(null)` value denotes no commission. - **DEPTNO**: Department Number, indicating the department to which the employee is assigned. This table can be used to understand the hierarchical structure within a company, analyze employment patterns, and compare employee salaries.
Transcribed Image Text:### Employee Details Table This table presents a dataset related to employees, including their roles, managers, and other key details. Below is a breakdown of each column and the data it contains. | **EMPNO** | **ENAME** | **JOB** | **MGR** | **HIREDATE** | **SAL** | **COMM** | **DEPTNO** | |-----------|-----------|--------------|---------|--------------|---------|----------|------------| | 7839 | KING | PRESIDENT | (null) | 17-NOV-81 | 5000 | (null) | 10 | | 7566 | JONES | MANAGER | 7839 | 02-APR-81 | 2975 | (null) | 20 | | 7902 | FORD | ANALYST | 7566 | 03-DEC-81 | 3000 | (null) | 20 | #### Column Explanation: - **EMPNO**: Employee Number, a unique identifier for each employee. - **ENAME**: Employee Name. - **JOB**: Job Title of the employee. - **MGR**: Manager's Employee Number, indicating who manages the employee. A `(null)` value indicates no manager. - **HIREDATE**: Date the employee was hired. - **SAL**: Salary of the employee. - **COMM**: Commission, if any, received by the employee. A `(null)` value denotes no commission. - **DEPTNO**: Department Number, indicating the department to which the employee is assigned. This table can be used to understand the hierarchical structure within a company, analyze employment patterns, and compare employee salaries.
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