CREATE TABLE volume (Artist_ID VARCHAR)
CREATE TABLE artist (Artist_ID VARCHAR, age VARCHAR)

What are the issue dates of volumes associated with the artist aged 23 or younger?
SELECT Issue_Date FROM artist AS T1 JOIN volume AS T2 ON T1.Artist_ID = T2.Artist_ID WHERE T1.age <= 23
SELECT "Issue_Date" FROM "artist" AS "T1" JOIN "volume" AS "T2" ON "T1"."Artist_ID" = "T2"."Artist_ID" WHERE "T1"."age" <= 23