Small white introduction to a subject, then the teacher asked a question of typo: queries with the same name the number of students list and statistics,
(the original title should be a query with the same name name the list of the students and the statistical number,)
Then I want to write out I will wrong, but can't write out the correct results
Consult!!!!!!

CodePudding user response:

SQL is oh,,, in CSDN Posting for the first time, in a flurry

CodePudding user response:

Group by available to count
Come on, all things are difficult before they are easy, you are first, then a simple