Question

表1每个id有一行，表2每个id有1行，其中entrytype = 0，而每个id有多行，其中entrytype = 1。

我运行以下查询：

SELECT sum(amount) FROM table1 where id = 'AUS|License|Maintenance|Aug_2016'

select sum(amount) from table2 where entrytype = 0 and id = 'AUS|License|Maintenance|Aug_2016'

select sum(amount) from table2 where entrytype = 1 and id = 'AUS|License|Maintenance|Aug_2016'

并获得以下结果：

7689.12

7689.12

7689.119999

现在，我想在两个表的sum(amount)中搜索表1 sum(amount) <> table2 sum(amount)的特定ID的情况

Answer 1

如果您想要一个特定的ID，可以使用cross join将它们组合在一起：

select t1.amount, t2_0.amount, t2_1.amount
from (SELECT sum(amount) as amount FROM table1 where id = 'AUS|License|Maintenance|Aug_2016'
     ) t1 cross join
     (select sum(amount) as amount from table2 where entrytype = 0 and id = 'AUS|License|Maintenance|Aug_2016'
     ) t2_0 cross join
     (select sum(amount) as amount from table2 where entrytype = 1 and id = 'AUS|License|Maintenance|Aug_2016'
     ) t2_1;

Answer 2

如果我正确理解了您的要求，则可以将每个查询都放在它们共同的id字段上，然后只需选择三个范围之和不相等的id值子查询，例如：

SELECT a.id, a.s1, b.s2, c.s3
FROM
(
    (
        SELECT id, SUM(amount) AS s1
        FROM table1 
        GROUP BY id
    ) a
    INNER JOIN
    (
        SELECT id, SUM(amount) AS s2
        FROM table2
        WHERE entrytype = 0
        GROUP BY id
    ) b ON a.id = b.id
)
INNER JOIN
(
    SELECT id, SUM(amount) AS s3
    FROM table2
    WHERE entrytype = 1
    GROUP BY id
) c ON a.id = c.id
WHERE NOT (a.s1 = b.s2 AND a.s1 = c.s3)

您未指定DBMS，所以为了防万一，我在其中加入了MS Access所需的额外括号。

通过使用INNER JOINs，我还假设您只对所有三个子查询中都存在的记录感兴趣；如果子查询之一是主查询，则使用LEFT JOINs加入其他两个子查询，以便返回主数据库中的所有记录。

包括后续注释中提到的另外两列-

SELECT a.id, a.s1, b.s2, c.s3, a.s1 - b.s2 AS s4, a.s1 - c.s3 AS s5
FROM
(
    (
        SELECT id, SUM(amount) AS s1
        FROM table1 
        GROUP BY id
    ) a
    INNER JOIN
    (
        SELECT id, SUM(amount) AS s2
        FROM table2
        WHERE entrytype = 0
        GROUP BY id
    ) b ON a.id = b.id
)
INNER JOIN
(
    SELECT id, SUM(amount) AS s3
    FROM table2
    WHERE entrytype = 1
    GROUP BY id
) c ON a.id = c.id
WHERE NOT (a.s1 = b.s2 AND a.s1 = c.s3)

SQL-搜索两个表的sum（amount）列不相等的情况

2 个答案: