Mysql 选择除最高记录外的所有记录
我有三张桌子Mysql 选择除最高记录外的所有记录,mysql,sql,select,join,mediawiki,Mysql,Sql,Select,Join,Mediawiki,我有三张桌子 Page Revision Text +-----------+-------------+ +-----------+-------------+----------+ +-------------+---------+ | page_id | rev_id | | rev _
Page Revision Text
+-----------+-------------+ +-----------+-------------+----------+ +-------------+---------+
| page_id | rev_id | | rev _id | rev_text_id | page_id | | rev_text_id | text |
+-----------+-------------+ +-----------+-------------+----------+ +-------------+---------+
| 1 | 2 | | 1 | 1 | 1 | | 1 | A |
+-------------------------- +------------------------------------+ +-----------------------+
| 2 | 5 | | 2 | 2 | 1 | | 2 | B |
+-------------------------+ +------------------------------------+ +-----------------------+
| 3 | 3 | 2 | | 3 | C |
+------------------------------------+ +-----------------------+
| 4 | 4 | 2 | | 4 | D |
+------------------------------------+ +-----------------------+
| 5 | 4 | 2 |
+------------------------------------+
我期望的输出是:
+--------+-------------+
| rev_id | rev_text_id |
+--------+-------------+
| 1 | 1 |
+----------------------+
| 3 | 3 |
+----------------------+
| 4 | |
+----------------------+
我的目标是找到可以在单个查询中从每个表中删除的rev_id和rev_text_id。由于修订表可以为多个修订保留相等的rev_text_id,因此我需要排除第2页示例4中每个页面最高的rev_text_id
我开始涉足以下领域:
SELECT
r.rev_id,r.rev_text_id
FROM revision r, page p, text t
WHERE p.page_id = r.page_id
AND t.rev_text_id = r.rev_text_id
AND p.rev_id != r.rev_id
AND r.rev_text_id not in (
SELECT max(r.rev_text_id)
FROM revision AS r, page AS p
WHERE r.rev_id = p.rev_id
);
但这会跳过我所需输出中rev_id 4的记录,并且不包括空情况。尝试以下操作:
SELECT r.`rev_id`, r.`rev_text_id`
FROM `Revision` AS r
WHERE r.`rev_text_id` NOT IN (SELECT r.`rev_text_id`
FROM `Revision` AS r, `Page` AS p
WHERE r.`rev_id` = p.`page_latest`;)
ORDER BY r.`rev_id`;
这基本上捕获了与PergEx最新相同的RevIdID,查找与RevIdID相关联的RevEthTythID ID,并使用那些RevTrimeStID ID作为筛选器。
请显示当前SQL Quer思,提供一个SQLFIDLE,并且,为了大家的理智,考虑将列重命名为RevIdID,PaGyId,和rev_text_id。该查询不会正确返回rev_id 4,因为您会过滤掉那些与page_latest具有相同rev_id的修订。我想要的输出包括rev_id 4,输出中没有附加rev_text_id。我猜这必须通过连接来实现?我不知道在纯SQL中是否有实现这一点的方法。我不知道有什么办法能把细胞分成那样的一行。在查询之后,您可能必须在PHP中处理该问题。