如何在 Postgresql 中组合多个 IN 子句？

Question

我有两个 table：带有列 ID 和标题的商品使用列 ID 进行过滤还有一个 cross-join table: filter_good 列 filterid 和 goodid 我需要在一个过滤器 ID 列表中找到与任何过滤器匹配的商品，并且还需要在另一个过滤器 ID 列表中找到与任何过滤器匹配的商品。我正在尝试使用此查询来实现它，但运气不佳：

SELECT
    goods.*
FROM
    goods
JOIN filter_good ON goods.id = filter_good.goodid
WHERE filter_good.filterid IN (3)
AND filter_good.filterid IN (1, 2)

如何做到这一点？

我需要 return 仅当存在 ID 为 3 且 ID 为 1 或 2 的记录时匹配的记录

Answer 1

好吧，你的问题确实不是那么清楚，但你可能需要一个 EXISTS 子句：

SELECT
    *
FROM
    goods
WHERE 
  EXISTS (
    SELECT * 
    FROM filter_good 
    WHERE goods.id = filter_good.goodid
      AND filter_good.filterid IN (3)
  )
  AND EXISTS (
    SELECT * 
    FROM filter_good 
    WHERE goods.id = filter_good.goodid
      AND filter_good.filterid IN (1,2)
  )

Answer 2

select g.id
from
    goods g
    inner join
    filter_good fg on g.id = fg.goodid
group by g.id
having bool_or(fg.filter_id = 3) and bool_or(fg.filter_id in (1,2))

Table 别名更清晰。

勾选bool_or aggregate function

如果需要其他 goods 列，请将其包装在外部查询中：

select *
from goods
where id in (
    select g.id
    from
        goods g
        inner join
        filter_good fg on g.id = fg.goodid
    group by g.id
    having bool_or(fg.filter_id = 3) and bool_or(fg.filter_id in (1,2))
)

如何在 Postgresql 中组合多个 IN 子句？

How to combine mulltiple IN clause in Postgresql?

postgresql

relational-division