Task Description: Consider the following relations for a company: Department (Did: integer, Dname: string, location: string) Employee (Eid: integer, Ename: string, Erank: integer, salary: real, DepartmentID, integer) Project (Pid: integer, DepartmentID: integer, Pname: string, budget: real, start year: integer) The “DepartmentID” fields in both Employee and Project are foreign keys referencing the “Did” field of the Department table. Through Java application, use SQL to insert (random but meaningful) data records in the above tables: 1) Create two different departments (named: Marketing and Human Resources) 2) Create at least three employees per department (6 employees in total). A rank of an employee is an integer value between 1 and 3. 3) Create at least three different projects per department (6 projects in total). The start year is between 2018 and 2020.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
Task Description: Consider the following relations for a company:
Department (Did: integer, Dname: string, location: string)
Employee (Eid: integer, Ename: string, Erank: integer, salary: real, DepartmentID, integer)
Project (Pid: integer, DepartmentID: integer, Pname: string, budget: real, start year: integer)
The “DepartmentID” fields in both Employee and Project are foreign keys referencing the “Did”
field of the Department table.
Through Java application, use SQL to insert (random but meaningful) data records in the above tables:
1) Create two different departments (named: Marketing and Human Resources)
2) Create at least three employees per department (6 employees in total). A rank of an employee is an integer value between 1 and 3.
3) Create at least three different projects per department (6 projects in total). The start year is between 2018 and 2020.
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