mysql: add average-population-of-each-continent

6 years ago · c2ce85ad4c
parent e86ffe9d4c
commit c2ce85ad4c
1 changed files with 4 additions and 0 deletions
--- a/mysql/average-population-of-each-continent/solution.sql
+++ b/mysql/average-population-of-each-continent/solution.sql
@ -0,0 +1,4 @@
+SELECT COUNTRY.CONTINENT, FLOOR(AVG(CITY.POPULATION))
+FROM CITY
+INNER JOIN COUNTRY ON COUNTRY.CODE = CITY.COUNTRYCODE
+GROUP BY COUNTRY.CONTINENT