mysql - 查找具有共同属性的重复项

Question

我正在尝试在 Drupal 站点上选择重复的节点，基本上我需要选择共享公共(public)“tnid”(翻译节点 ID)并且共享相同“语言”的节点。

但是我不知道如何编写查询，我想我做了第一部分，找到具有共同 tnid 的节点，就像这样

SELECT origin.nid, origin.tnid, origin.title, origin.language
FROM node AS origin
JOIN (select nid, tnid from node
      group by tnid having count(tnid) > 1) common_tnid ON common_tnid.tnid = origin.tnid
#JOIN node common_lang ON common_lang.language = origin.language
                      AND common_lang.tnid = origin.tnid
WHERE origin.tnid != 0

考虑到语言部分是我的一大障碍，我如何将其添加到查询中？因此，我尝试了很多东西。评论。

Answer 1

试试这个:

SELECT
  table1.nid nid,
  table1.tnid tnid,
  table1.language language,
  table1.title title
FROM
  (
    SELECT *
    FROM
      table1
    GROUP BY
      tnid, language
    HAVING
      COUNT(*) > 1
  ) dupe
  LEFT JOIN
  table1
    ON dupe.tnid = table1.tnid
       AND dupe.language = table1.language

SQL fiddle :http://sqlfiddle.com/#!9/294cc/1/0