CREATE TABLE city (city_id NUMBER, city CLOB, hanzi CLOB, hanyu_pinyin CLOB, regional_population NUMBER, gdp NUMBER)
CREATE TABLE match (match_id NUMBER, date CLOB, venue CLOB, score CLOB, result CLOB, competition CLOB)
CREATE TABLE hosting_city (year NUMBER, match_id NUMBER, host_city CLOB)
CREATE TABLE temperature (city_id NUMBER, jan NUMBER, feb NUMBER, mar NUMBER, apr NUMBER, jun NUMBER, jul NUMBER, aug NUMBER, sep NUMBER, oct NUMBER, nov NUMBER, dec NUMBER)

Find the city that hosted the most events.
SELECT T1.city FROM city AS T1 JOIN hosting_city AS T2 ON T1.city_id = T2.host_city GROUP BY T2.host_city ORDER BY COUNT(*) DESC LIMIT 1
SELECT "T1"."city" FROM "city" "T1" JOIN "hosting_city" "T2" ON "T1"."city_id" = "T2"."host_city" GROUP BY "T2"."host_city" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY