CREATE TABLE "city" (
"City_ID" int,
"City" text,
"Hanzi" text,
"Hanyu_Pinyin" text,
"Regional_Population" int,
"GDP" real,
PRIMARY KEY ("City_ID")
)

CREATE TABLE "match" (
"Match_ID" int,
"Date" text,
"Venue" text,
"Score" text,
"Result" text,
"Competition" text,
PRIMARY KEY ("Match_ID")
)

CREATE TABLE "temperature" (
"City_ID" int,
"Jan" real,
"Feb" real,
"Mar" real,
"Apr" real,
"Jun" real,
"Jul" real,
"Aug" real,
"Sep" real,
"Oct" real,
"Nov" real,
"Dec" real,
PRIMARY KEY ("City_ID"),
FOREIGN KEY (`City_ID`) REFERENCES `city`(`City_ID`)
)

CREATE TABLE "hosting_city" (
  "Year" int,
  "Match_ID" int,
  "Host_City" text,
  PRIMARY KEY ("Year"),
  FOREIGN KEY (`Host_City`) REFERENCES `city`(`City_ID`),
  FOREIGN KEY (`Match_ID`) REFERENCES `match`(`Match_ID`)
)
SELECT count(*) ,  Competition FROM MATCH GROUP BY Competition
Find the number of matches in different competitions.