SELECT Nationality FROM member GROUP BY Nationality HAVING COUNT(*)  >=  2
Show the nations that have at least two members.
CREATE TABLE "member" (
"Member_ID" int,
"Name" text,
"Nationality" text,
"Age" int,
PRIMARY KEY ("Member_ID")
);
CREATE TABLE "club" (
"Club_ID" int,
"Overall_Ranking" int,
"Team_Leader" text,
"Club_Name" text,
PRIMARY KEY ("Club_ID")
);
CREATE TABLE "club_leader" (
"Club_ID" int,
"Member_ID" int,
"Year_Join" text,
PRIMARY KEY ("Club_ID","Member_ID"),
FOREIGN KEY ("Club_ID") REFERENCES `club`("Club_ID"),
FOREIGN KEY ("Member_ID") REFERENCES `member`("Member_ID")
);
INSERT INTO  "member" VALUES ("1984","Wally Lewis","Australia",23);
INSERT INTO  "club" VALUES ("1","5","Mack Mitchell","Houston");
INSERT INTO  "club_leader" VALUES (1,1988,"2018");