CREATE TABLE exhibition_record (Exhibition_ID NUMBER, Date CLOB, Attendance NUMBER)
CREATE TABLE exhibition (Exhibition_ID NUMBER, Year NUMBER, Theme CLOB, Artist_ID NUMBER, Ticket_Price FLOAT)
CREATE TABLE artist (Artist_ID NUMBER, Name CLOB, Country CLOB, Year_Join NUMBER, Age NUMBER)

For artist names who are not from United States, show me a stacked that the x-axis is the Year_Join and the group by name in Y.
SELECT Year_Join, COUNT(Year_Join) FROM artist WHERE Country <> 'United States' GROUP BY Name
SELECT "Year_Join", COUNT("Year_Join") FROM "artist" WHERE "Country" <> 'United States' GROUP BY "Name"