MySQL 结果集问题

Question

我有一系列作者姓名，我必须选择一些作者文章，但作者姓名存在于文本内容中。有没有什么好的解决方案，我不必逐一获取记录，我可以在单个查询中获取每个作者的记录。

SELECT n0_.id AS id0 
  FROM newspaper n0_ 
       INNER JOIN newspaper_translation n1_ ON n0_.id = n1_.translatable_id
       INNER JOIN newspaper_channels n3_ ON n0_.id = n3_.news_id 
       INNER JOIN channels c2_ ON c2_.id = n3_.channel_id 
 WHERE n1_.locale = 'zh_CN' 
   AND (c2_.reference_id = '057PL' AND n1_.content LIKE '%黎子珍%') 
 ORDER BY n0_.id DESC 
 LIMIT 1 

我想传递多个作者姓名并希望获得每个作者的单个记录。但我想执行一次查询。

Answer 1

您可以使用一系列 or 语句构造 where 子句:

WHERE n1_.locale = 'zh_CN' AND c2_.reference_id = '057PL' AND
      (n1_.content LIKE '%黎子珍%' OR n1_.content LIKE '%子珍%' OR n1_.content LIKE '%黎子%')

但是，如果您对数据库有任何控制权，则应该有一个将作者与每个项目相匹配的表，每个作者和该作者所从事的项目各占一行。这称为联结表，它使回答这些类型的问题变得更加容易。

编辑:

您可以获取原始查询并使用union all重复它:

(SELECT n0_.id AS id0 
  FROM newspaper n0_ 
       INNER JOIN newspaper_translation n1_ ON n0_.id = n1_.translatable_id
       INNER JOIN newspaper_channels n3_ ON n0_.id = n3_.news_id 
       INNER JOIN channels c2_ ON c2_.id = n3_.channel_id 
 WHERE n1_.locale = 'zh_CN' 
   AND (c2_.reference_id = '057PL' AND n1_.content LIKE '%黎子珍%') 
 ORDER BY n0_.id DESC 
 LIMIT 1 )
UNION ALL
(SELECT n0_.id AS id0 
  FROM newspaper n0_ 
       INNER JOIN newspaper_translation n1_ ON n0_.id = n1_.translatable_id
       INNER JOIN newspaper_channels n3_ ON n0_.id = n3_.news_id 
       INNER JOIN channels c2_ ON c2_.id = n3_.channel_id 
 WHERE n1_.locale = 'zh_CN' 
   AND (c2_.reference_id = '057PL' AND n1_.content LIKE '%黎珍%') 
 ORDER BY n0_.id DESC 
 LIMIT 1 )

但是，此时您不妨运行单独的查询。