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  1. Prepare
  2. SQL
  3. Basic Join
  4. Average Population of Each Continent
  5. Discussions

Average Population of Each Continent

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1723 Discussions

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  • adyant28
     + 1 comment

    What is the necessity of using group by?

  • anw_g01
     + 2 comments
    SELECT
    COUNTRY.Continent,
    FLOOR(AVG(CITY.Population))
FROM
    CITY
INNER JOIN
    COUNTRY
ON
    CITY.CountryCode = COUNTRY.Code
GROUP BY
    COUNTRY.Continent;

  • syncwithsekhar
     + 0 comments

    SELECT CO.Continent, TRUNCATE(AVG(CI.POPULATION),0) FROM CITY AS CI INNER JOIN COUNTRY AS CO ON CI.CountryCode = CO.Code GROUP BY CO.Continent;

  • mahamzah535
     + 0 comments

    Gah daymmn, why should we use floor?

    SELECT COUNTRY.CONTINENT, ROUND(AVG(CITY.POPULATION), 2)
FROM CITY
LEFT JOIN COUNTRY ON CITY.COUNTRYCODE = COUNTRY.CODE
GROUP BY COUNTRY.CONTINENT

    Thought this is already correct

  • lokesh1999sathya
     + 0 comments

    select ctr.continent, floor(avg(c.population)) as average_population from city c join country ctr on ctr.code = c.countrycode group by ctr.continent;