mySQL INNER JOIN 和 UNION ALL

Question

我有一个 table，其中的行在日期和类别 'bar' 匹配时被分组，现在我需要 INNER JOIN 这些与另一个 table 并使用WHERE answer = '2' 来自 table，但我不知道该怎么做。

SELECT category, date, client
FROM sbs_events
WHERE category <> 'bar'
UNION ALL
SELECT category, date, MIN(client) AS client
FROM sbs_events
WHERE category = 'bar'
GROUP BY category, date

我做了一个SQL Fiddle

我需要添加到 fiddle 的是

INNER JOIN sbs_userEvents
ON sbs_events.id = sbs_userEvents.event_id
WHERE answer = 2
AND user_id = 1

但是因为我已经有了 WHERE category = 'bar' 我不知道如何添加它。

Answer 1

SELECT category, date, client
FROM sbs_events
INNER JOIN sbs_userEvents ON sbs_events.id = sbs_userEvents.event_id
WHERE category <> 'bar' AND answer = 2 AND user_id = 1

UNION ALL

SELECT category, date, MIN(client) AS client
FROM sbs_events
INNER JOIN sbs_userEvents ON sbs_events.id = sbs_userEvents.event_id
WHERE category = 'bar' AND answer = 2 AND user_id = 1
GROUP BY category, date

mySQL INNER JOIN 和 UNION ALL

mySQL INNER JOIN together with UNION ALL

mysql

inner-join

union-all