Write a program to achieve simple performance management. All data are stored in the database; it is required to be able to count the average score of each course and the number of students in each section, as well as the average score of each course and the number of students in each section according to the class; to query the examination results of students by the number or name of the students, and to query the students by the section of the scores.

Filename	Size	Update
.classpath	301	2019-05-19
.project	389	2019-05-20
.settings	0	2019-05-20
.settings\org.eclipse.jdt.core.prefs	598	2019-05-19
bin	0	2019-05-20
bin\s201726702154	0	2019-05-20
bin\s201726702154\s201726702154.class	7571	2019-05-20
src	0	2019-05-20
src\s201726702154	0	2019-05-20
src\s201726702154\s201726702154.java	6609	2019-05-20

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．