如何相交2个子查询

问题描述

您好，我想将2个长查询彼此相交，但是我发现您只能与简单查询相交。可以得到这样的东西吗？

`SELECT id,name as antibodyName FROM Antibodies WHERE
                id IN 
                ((SELECT id FROM Antibodies WHERE name LIKE ?
                UNION all
                SELECT antiId FROM AssignedColors WHERE name LIKE ?
                UNION all
                SELECT antiId FROM AssignedReactivities WHERE name LIKE ?)
                INTERSECT
                (SELECT id FROM Antibodies WHERE name LIKE ?
                  UNION all
                  SELECT antiId FROM AssignedColors WHERE name LIKE ?
                  UNION all
                  SELECT antiId FROM AssignedReactivities WHERE name LIKE ?)
                )
                AND dateOfCreation >= ? AND dateOfCreation <= ?
                ORDER BY dateOfCreation DESC LIMIT ? OFFSET ?;`

实际上我想获取其他查询的并集的交集。

解决方法

对于每个联合查询，您必须使用SELECT语句：

SELECT id,name as antibodyName 
FROM Antibodies 
WHERE id IN (
  SELECT id FROM
  (
    SELECT id FROM Antibodies WHERE name LIKE ?
    UNION all
    SELECT antiId FROM AssignedColors WHERE name LIKE ?
    UNION all
    SELECT antiId FROM AssignedReactivities WHERE name LIKE ?
  )
  INTERSECT
  SELECT id FROM
  (
    SELECT id FROM Antibodies WHERE name LIKE ?
    UNION all
    SELECT antiId FROM AssignedColors WHERE name LIKE ?
    UNION all
    SELECT antiId FROM AssignedReactivities WHERE name LIKE ?
  )
) AND dateOfCreation >= ? AND dateOfCreation <= ?
ORDER BY dateOfCreation DESC LIMIT ? OFFSET?;

,

如果我正确理解了您的问题，那么“内在加入”将有助于最有效地解决问题。内部的INSERSECT可以更改为以下代码，外部的SELECT可以保持不变。

(SELECT id FROM Antibodies WHERE name LIKE ?
UNION all
SELECT antiId FROM AssignedColors WHERE name LIKE ?
UNION all
SELECT antiId FROM AssignedReactivities WHERE name LIKE ?) A
JOIN
(SELECT id FROM Antibodies WHERE name LIKE ?
UNION all
SELECT antiId FROM AssignedColors WHERE name LIKE ?
UNION all
SELECT antiId FROM AssignedReactivities WHERE name LIKE ?) B
ON A.id = B.id