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我有以下SQL查询：左/右/内对MySQL的声明加入
SELECT band.id bid, band.name, bandInfo.summary, bandImage.url bandImage,
user.username, user.online, userImage.url userImage
FROM bands AS band
INNER JOIN band_info AS bandInfo ON band.id = bandInfo.bid
LEFT JOIN band_images AS bandImage ON band.id = bandImage.bid
LEFT JOIN band_followers AS follower ON follower.bid = band.id
RIGHT JOIN users AS user ON user.id = follower.uid
INNER JOIN user_info AS userInfo ON userInfo.uid = user.id
LEFT JOIN user_images AS userImage ON user.id = userImage.uid
WHERE ((band.activated = 1) AND (user.activated = 1)) AND (bandInfo.language = 'fr')
ORDER BY band.name
“用户”表包含所有用户（一行=一个用户）
“USER_INFO”表包含所有关于用户的信息（一行=一个用户）
“user_images”表包含有关用户的所有图像（一行=一个用户）
“乐队”表包含了所有的乐队（一行=一个波段）
“band_info”表包含有关一个频带中的所有信息（多行用于一个频带由于语言）
“band_images”表包含有关频带中的所有图像（一行=一个频带）
“ band_followers'表包含用户和乐队之间的所有关系（一行=一个关系，所以有很多行包含相同的乐队ID但不是相同的用户ID）
我想检索所有乐队与他们的信息（INNER JOIN ）即使乐队ID不在band_followers表中。即使他没有任何图像，我也想通过用户的信息（INNER JOIN）检索乐队ID在band_followers表中带有INNER JOIN的用户的信息（INNER JOIN）。
我的问题是就在JOIN关键字..我真的不知道，如果我要使用LEFT或RIGHT JOIN
谢谢！
更新应答：
SELECT band.id bid, band.name, bandInfo.summary, bandImage.url bandImage, user.username, user.online, userImage.url userImage
FROM bands AS band
INNER JOIN band_info AS bandInfo ON band.id = bandInfo.bid
LEFT JOIN band_images AS bandImage ON band.id = bandImage.bid
LEFT JOIN band_followers AS follower ON band.id = follower.bid
LEFT JOIN users AS user ON user.id = follower.uid AND user.activated = 1
LEFT JOIN user_info AS userInfo ON userInfo.uid = user.id
LEFT JOIN user_images AS userImage ON user.id = userImage.uid
WHERE (band.activated = 1) AND (bandInfo.language = 'fr')
ORDER BY band.name
谢谢大家
这是正确的答案，谢谢！ – everytimeicob