added another sql command

Useful-SQL-commands.md

@@ -1,2 +1,5 @@
 View which titles have at least 1 rank applied to it:
-* SELECT gwtitles.titlename FROM gwtitles WHERE titlenameid IN (SELECT titlenameid FROM gwsubtitles) ORDER BY titlename ASC;
+* SELECT gwtitles.titlename FROM gwtitles WHERE titlenameid IN (SELECT titlenameid FROM gwsubtitles) ORDER BY titlename ASC;
+
+Get the maximum entered sub-title rank:
+* SELECT MAX(strank) FROM gwsubtitles WHERE titlenameid = ?;