Add sanity-check queries

Author: npalix

sql/sanity-check.sql

@@ -3,4 +3,21 @@ from authors a
      right outer join history h
      on a.author_id = h.author_id 
      or a.author_id = h.committer_id
-where h.commit_id = null;
+where h.commit_id = null;
+
+select * from versions order by release_date desc limit 1;
+
+select version_name, count(file_id) as number_of_files
+from full_files
+where version_main = 3
+group by version_name, release_date
+order by release_date;
+
+select version_name, count(function_id) as number_of_functions
+from functions, full_files
+where version_main = 3
+and functions.file_id = full_files.file_id
+group by version_name, release_date
+order by release_date;
+
+