あなたはこれを助けるためにクリケットの知識を必要とするかもしれません。次の表が与えられた場合、このクエリはこの結果を生成しますか?
Table: batsmen
batsmanname | runsscored | howout
Colin | 10 | bowled
Colin | 20 | caught
Steve | 10 | bowled
Steve | 20 | not out
SELECT batsmanname, SUM(runsscored) / COUNT(howout) AS battingavg
FROM batsmen
WHERE howout <> 'not out'
GROUP BY batsmananme
Result:
batsmanname | battingavg
Colin | 15
Steve | 30