我很想知道,以下询问为什么回到我的桌边的空位,而不是零点? 因为在司机的桌子里,谁也不能返回零? 非常感谢任何帮助。
Thanks
SELECT
SUM(IF(qual_pos = 1 , 1,0)) AS poles,
SUM(IF(race_pos <= 3 , 1,0)) AS podiums,
SUM(IF(race_pos = 1 , 1,0)) AS victories,
SUM(overtakes) AS overtakes
FROM driver_stats s
left join drivers d on d.drivers_id = s.drivers_id
WHERE d.team_id = $row[team_id]
如果您将<代码>>>>>>>>>> > > 编码改为right>>? 或者说只是迁出?
drivers d left join driver_stats s
如果您的<代码>SUM(0>,结果为NUL。 我同意你的看法,认为答案是零,但情况是这样。 我建议使用
COALESCE(SUM(IF(qual_pos = 1 , 1,0)), 0) AS poles
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