several conditions in the same sql query (having and min) - sql

Question

I have a table with these variables and I want to select the row where sum of the VALUE is greater than 1000 and at the same time the MONTH is the minimum
|CLIENT |MONTH |VALUE
|1 |1 |500
|1 |2 |1050
|1 |3 |1100
the result should be this:
|CLIENT|MONTH|VALUE
|1 |2 |1050
Is it possible to do it in only one query?
My attempt:
SELECT
client,
SUM(value) AS SUM_of_value,
MIN(month) AS MIN_of_month,
FROM mytable
GROUP BY 1
having SUM_of_value>1000;

Answer 1

You coud try using a join between your query and the query group by client and month
select t.client, t2.SUM_of_value, t2.MIN_of_month
from (
SELECT
client,
SUM(value) AS SUM_of_value,
MIN(month) AS MIN_of_month,
FROM mytable
GROUP BY 1
having SUM_of_value>1000;
) t1
inner join (
SELECT
client,
month ,
SUM(value) AS SUM_of_value
FROM mytable
GROUP BY 1,2
having SUM_of_value>1000;
) t2 ON t2.client = t1.client
AND t2.month = t1.MIN_of_month

Answer 2

If you want one row, then you can use order by:
select t.*
from mytable
where value > 1000
order by month
fetch first 1 row only;
I'm not sure why your query refers to "sum of value", because there is only one value per month for the data in the question.
EDIT:
Based on the comment, you do seem to want an aggregation query:
select client, month, sum(value)
from
group by client, month
having sum(value) > 1000
order by month
fetch first 1 row only;

Answer 3

Borrowing from Gordon and Forpas. Your sample data and output seems too simplistic. I think you would want one row per client.
select t.client, t.month, t.value
from (
select client, month, sum(value) as value, row_number() over (partition by client order by month) rn
from my_table
group by client, month
having sum(value) > 1000
) t
where t.rn = 1

Answer 4

If there is only 1 VALUE per each MONTH then use ROW_NUMBER() window function:
select t.CLIENT, t.MONTH, t.VALUE
from (
select *, row_number() over (partition by client order by month) rn
from mytable
where value > 1000
) t
where t.rn = 1
See the demo.
Results:
| CLIENT | MONTH | VALUE |
| ------ | ----- | ----- |
| 1 | 2 | 1050 |