Question

我有这个sql：

SELECT `feed_entries` . *
FROM `feed_entries`
WHERE 
id
IN (

SELECT `e`.`id`
FROM `feed_entries` AS `e`
INNER JOIN `feeds` AS `f` ON e.feed_id = f.id
INNER JOIN `entries_categorias` AS `ec` ON ec.entry_id = e.id
INNER JOIN `categorias` AS `c` ON ec.categoria_id = c.id
WHERE 
  e.deleted =0
AND 
  c.slug
  IN ('manchete', 'google')
GROUP BY `e`.`id`
HAVING COUNT( DISTINCT ec.id ) =2

)

ORDER BY `date` DESC
LIMIT 1

我想添加这些字段：

`f`.`titulo` AS `feedTitulo` , `f`.`url` AS `feedUrl`

我该怎么做？没有得到这个错误：

#1241 - Operand should contain 1 column(s)

Answer 1

这应该有效：

SELECT e1.*, f1.titulo AS feedTitulo, f1.url AS feedUrl
  FROM feed_entries AS e1 JOIN feeds AS f1 ON e1.feed_id = f1.id
 WHERE f1.id IN
            (SELECT e.id
               FROM feed_entries            AS e
              INNER JOIN feeds              AS f  ON e.feed_id = f.id
              INNER JOIN entries_categorias AS ec ON ec.entry_id = e.id
              INNER JOIN categorias         AS c  ON ec.categoria_id = c.id
              WHERE e.deleted = 0
                AND c.slug IN ('manchete', 'google')
              GROUP BY e.id
             HAVING COUNT(DISTINCT ec.id) = 2
            )
 ORDER BY `date` DESC
 LIMIT 1

我删除了大部分的后退，因为它们看起来非常奇怪 - 但我不使用MySQL。

如何在sql中添加外表中的其他列？

1 个答案: