Individual queries are working but grouping them to a single query not working

Question

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I am using 3 tables where group by id has to be implemented on first to tables
And not on 3rd table since the columns are different in 3rd table
but i should get the complete combination as one result set

Sample Data in Table 1

Id    Name    CreatedOn     SpentAmt
1     abc     2023/03/31      1000
2     Test    2023/03/31      14000
3     Mark    2023/03/31      2000
4     Robert  2023/03/31      700

Sample Data in Table 2

Id    Name     CreatedOn      UsedAmt
1     abc      2023/04/01      2000
7     Grace    2023/03/23      4000
2     Test     2023/03/15      10000
9     Mary     2023/03/10      1000

What I have tried:

Expected OutPut

Id   Name    SpentAmt     UsedAmt
1    abc      1000         2000
2    Test     14000        10000
3    Mark     2000         Null
4    Robert   700          Null
7    Grace    Null         4000
9    Mary     Null         1000

SQL

select id,
       name,
       spentamt as amt
FROM tbl1
where createdon >= '2021-04-01'
group by id,
       name

SQL

select id,
       name,
       usedamt as amt
FROM tbl2
where createdon >= '2021-04-01'
group by id,
       name

Posted 20-Apr-23 2:25am

User Newman

Updated 20-Apr-23 4:33am

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Comments

raddevus 20-Apr-23 9:37am

I can't tell what you want from your question. I don't see any reference to your 3rd table.
Why don't you try writing up working example at http://sqlfiddle.com/ then add a link to your question?

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Richard Deeming · Answer 1 · 2023-04-20T04:33:00

Seems like you're working on the same problem as this other user:
Only one expression can be specified in the select list when the subquery is not introduced with EXISTS with multiple queries[^]

You both have badly-structured data, and you both have terrible choice in table names.

The hacky workaround is virtually the same:

SQL

WITH cte As
(
    SELECT id, name FROM tbl1
    UNION SELECT id, name FROM tbl2
)
SELECT
    N.id,
    N.name,
    (
        SELECT Sum(SpentAmt)
        FROM tbl1 As S
        WHERE S.id = N.id And S.name = N.name
        And S.createdon >= '2021-04-01'
    ) As SpentAmt,
    (
        SELECT Sum(SpentAmt)
        FROM tbl2 As S
        WHERE S.id = N.id And S.name = N.name
        And S.createdon >= '2021-04-01'
    ) As UsedAmt
FROM
    cte As N
;