如何更改此查詢以使用連接？

Question

SELECT breakgame, Streak, 
((SELECT (maxGameId - gameId) as gameGap 
FROM game_result 
WHERE game_result.breakgame >= kokopam.game_streak.breakgame 
ORDER BY gameId DESC LIMIT 1)/ Streak) as nowWeight 
FROM kokopam.game_streak, (SELECT max(gameId) as maxGameId FROM game_result ORDER BY gameId DESC LIMIT 1) maxGameId 
WHERE breakgame>= 2 

如何更改此查詢以使用連接？

請幫我

Answer 1

排在首位，你應該在「where」子句，指出該行就共享ID所的條件。

無論如何，您使用的方法與內連接的工作方式相同。

Select * 
From tableA a, tableB b 
Where a.id=b.id 

相同

Select * 
From tableA a 
Inner join tableB b on b.id=a.id 

我可以幫你多一點，如果你指定你試圖在查詢該表具有列做。