sql - 从 SQL 中的多个表中获取记录数

Question

我有 3 个表 Box、Documemts、Batches。每个盒子包含超过 1 个文档，每个文档有多个批次。我想选择文档中至少有 1 个批次的值为 IsDeleted = 0 的文件夹中的文档计数。

让我们假设文档有 10 个批次，如果至少有一个批次的值 isdeleted = 0，我们将计算它，否则如果所有批次的 isdeleted = 1，我们将不计算它。

如何根据上述情况选择编号文件？

我试过了，但它不起作用

SELECT b.ID as BOXID,d.ID as DocID, count(1) as CountDoc 
  FROM Documents as d 
 INNER JOIN dbo.Boxes as b on d.boxid = b.id 
 INNER JOIN dbo.Batches as t on d.ID = t.DocumentID 
 WHERE d.ID = t.DocumentID 
   AND d.boxid= b.id 
   AND t.isDeleted = 0 
 GROUP BY d.ID , t.DocumentID ,b.ID --HAVING t.isDeleted = 0

Answer 1

select boxid, count(distinct documentid)
from 
    documents
         inner join batches
    on documents.id = batches.documentid
where
    isdeleted = 0
group by boxid