Question

我有以下联合查询，它为联合的第一部分返回8，为第二部分返回1。我想知道如何合并总数，结果是9。

这是查询

SELECT COUNT(*)
FROM media
LEFT JOIN users ON users.id = media.userId
WHERE media.title LIKE '%braydo25%' OR media.description LIKE '%braydo25%' OR media.tags LIKE '%braydo25%' OR users.username LIKE 'braydo25'
UNION ALL
SELECT COUNT(*)
FROM reposts
LEFT JOIN media ON media.id = reposts.mediaId
LEFT JOIN users ON users.id = reposts.userId
WHERE media.title LIKE '%braydo25%' OR media.description LIKE '%braydo25%' OR media.tags LIKE '%braydo25%' OR users.username LIKE 'braydo25'

Answer 1

结合后的计数总结：

select sum(cnt)
from (SELECT COUNT(*) as cnt
      FROM media
      LEFT JOIN users ON users.id = media.userId
      WHERE media.title LIKE '%braydo25%' OR media.description LIKE '%braydo25%' OR media.tags LIKE '%braydo25%' OR users.username LIKE 'braydo25'
      UNION ALL
      SELECT COUNT(*)
      FROM reposts
      LEFT JOIN media ON media.id = reposts.mediaId
      LEFT JOIN users ON users.id = reposts.userId
      WHERE media.title LIKE '%braydo25%' OR media.description LIKE '%braydo25%' OR media.tags LIKE '%braydo25%' OR users.username LIKE 'braydo25'
     ) t;

如何获得此联合中行数的总和？

1 个答案: