Table: top_singles_1981_canada
Columns: volume_issue
issue_date_s
weeks_on_top
song
artist

Question: What is the Volume:Issue for the song " stars on 45 medley "?
SQL: SELECT "volume_issue" FROM top_singles_1981_canada WHERE "song" = '" stars on 45 medley "'

Question: What is the Issue with less than 6 weeks on top and for the song " the friends of mr. cairo "?
SQL: SELECT "issue_date_s" FROM top_singles_1981_canada WHERE "weeks_on_top" < 6 AND "song" = '" the friends of mr. cairo "'

Question: What is the sum of Weeks on Top for the Volume:Issue 34:9-12?
SQL: SELECT SUM("weeks_on_top") FROM top_singles_1981_canada WHERE "volume_issue" = '34:9-12'