sql - 参考第一个查询结果以签入另一个表

Question

我有以下查询

SELECT abm_took_id FROM pos_took WHERE DELETEDDATE IS NOT NULL

abm_took_id它从 table获取值pos_took。

现在有另一个表pos_eook，它由作为外键的列组成cbm_bookid，即第一个表的 ( pos_took) 主键abm_took_id是第二个表 ( pos_eook) 的外键cbm_bookid。

现在我必须检查abm_took_id从第一个查询引用中提取的是否存在于第二个表中，例如abm_took_id=44555从第一个查询中提取，现在它是否存在于第二个表中，请告知我可以在哪里使用或存在运算符的查询.

Answer 1

如果您试图在第一个表（查询）中查找不在第二个表中的所有引用：

SELECT abm_took_id
FROM pos_took
WHERE DELETEDDATE IS NOT NULL and
      abm_took_id not in (select cbm_bookid
                          from pos_eook
                          where cbm_bookid is not null
                         );