Query for counting total number of submissions per researcher

Question

I have 3 tables relating to Submission and Researcher.

Submission table:

SubmissionID, Type, Title, Status, Comment, CapturedOnRIMS, NumberOfAuthors, NumberOfWitsAuthors, TotalPages, PagesInPreamble, PagesInText, NumberOfChapters, Location, PublicationID, CESMID, SubmissionDate

Researcher table:

ResearcherID, FirstName, Surname, RegistrationDate, QualificationType, JobName, Availability, SchoolID

ResearcherSubmission (relational table):

SubmissionID, ResearcherID

I am trying to create a query that display a count of the total number of submissions per researcher. A researcher can have many submissions, and a submission can be done by many researchers, hence the relational table.

Desired output:

Name             Number of Submission
John Doe                   14
William Smith              10
Ellie Carter               12
Susan Wright               10

Answer 1

Simply JOIN the tables and do a group by :

select r.FirstName, r.LastName, count(*) as no_of_sub
from Researcher r
  join ResearcherSubmission rs on r.ResearcherID = rs.ResearcherID
  join Submission s on s.SubmissionID = rs.SubmissionID
group by r.FirstName, r.LastName