The human resources department of an enterprise maintains a database on the company’s employees…

The human resources department of an enterprise maintains a database on the company’s employees in order to track their qualifications at various skill levels. The tables are as follows.

The human resources department of an enterprise maintains a database on the company’s employees in...

All attributes are text data types except DATE_QUALIFIED, which is a date data type. The database can be downloaded from the web site supporting this book.

(a) Identify the primary key(s) and foreign key(s) of each table.

(b) Write the SQL commands to return the following data from the database:

(1) The first and last names of the employees who work in Department 30

(2) The first and last names of employees with the skill ID of 110

(3) The first and last names of the employees who are “C Programmers”

(4) The number of “Java Programmers” in Department 30

(5) The last and first names of the “Java Programmers” in Department 30 listed alphabetically by last name

(6) The department ID and department name, listed without repetition, of any departments that do not have “Java Programmers”

 

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