Join 2 queries with equal fields created dynamically - sql

Question

I have a table that i wanted to create some charts.
Basically i need to know how many registers i have in interval of 10 minutes and how many of them are already pos-processed. With this 2 queries i have the info i need, but i need they 2 in just 1 result table.
First query
SELECT
(
CAST(DATEPART(HOUR, m.Ocr_DataHora) AS NVARCHAR) +
':' +
CAST((DATEPART(MINUTE, m.Ocr_DataHora) % 6) AS NVARCHAR) +
'0'
) AS Hora,
COUNT(*) AS Movimentações
FROM
Integracao m
WHERE
m.Ocr_DataHora >= '2012-09-17 00:00:00.000'
AND m.Ocr_DataHora < '2012-09-18 00:00:00.000'
GROUP BY
DATEPART(HOUR, m.Ocr_DataHora),
(DATEPART(MINUTE, m.Ocr_DataHora) % 6)
ORDER BY
DATEPART(HOUR, m.Ocr_DataHora),
(DATEPART(MINUTE, m.Ocr_DataHora) % 6)
Second query
SELECT
(
CAST(DATEPART(HOUR, s.Ocr_DataHora) AS NVARCHAR) +
':' +
CAST((DATEPART(MINUTE, s.Ocr_DataHora) % 6) AS NVARCHAR) +
'0'
) AS Hora,
COUNT(*) AS Sucesso
FROM
Integracao s
WHERE
s.Veiculo_Modelo <> ''
AND s.Ocr_DataHora >= '2012-09-17 00:00:00.000'
AND s.Ocr_DataHora < '2012-09-18 00:00:00.000'
GROUP BY
DATEPART(HOUR, s.Ocr_DataHora),
(DATEPART(MINUTE, s.Ocr_DataHora) % 6)
How can i join them if my common field is generated dynamically?

Answer 1

As others have already told you, you could just use the two queries as derived tables (subselects) and join them using each one's Hora column. It doesn't matter if the column is computed in the query, it's perfectly legal to use it in a join condition.
However, I think you can get the same results more efficiently, by calculating both counts in a single query (i.e. without subqueries). Here's how you can do that:
SELECT
(
CAST(DATEPART(HOUR, m.Ocr_DataHora) AS NVARCHAR) +
':' +
CAST((DATEPART(MINUTE, m.Ocr_DataHora) % 6) AS NVARCHAR) +
'0'
) AS Hora,
COUNT(*) AS Movimentações,
COUNT(CASE WHEN s.Veiculo_Modelo <> '' THEN 1 END) AS Sucesso
FROM
Integracao m
WHERE
m.Ocr_DataHora >= '2012-09-17 00:00:00.000'
AND m.Ocr_DataHora < '2012-09-18 00:00:00.000'
GROUP BY
DATEPART(HOUR, m.Ocr_DataHora),
(DATEPART(MINUTE, m.Ocr_DataHora) % 6)
ORDER BY
DATEPART(HOUR, m.Ocr_DataHora),
(DATEPART(MINUTE, m.Ocr_DataHora) % 6)
As you can see, the query doesn't filter rows on s.Veiculo_Modelo <> ''. However, that condition is used when counting rows for the Sucesso column. The argument of the second COUNT is a CASE expression. It returns a value (arbitrarily chosen to be 1, but could be anything really) if the specified condition is met and NULL otherwise. Since COUNT omits nulls, the result will be the same as with your dedicated query calculating and returning Sucesso.

Answer 2

I am assuming that you want the output to be as follows:
Hora | Movimentações | Sucesso
You can use the two SQL queries as if they are table using the WITH statement as follows:
WITH
firstQuery(Hora, Movimentações) AS (<first query definition with out ORDER BY >),
secondQuery(Hora, Sucesso) AS (<second query definition with out ORDER BY >)
SELECT
f.Hora, f.Movimentações , s.Sucesso
FROM
firstQuery f
JOIN secondQuery s
ON f.Hora = s.Hora

Answer 3

You should be able to do this by putting them in a sub query in a from clause. The way I'm referring to has the following form:
Select A.Hora,A.Movimentações,B.Sucesso
From (*First Query*) as A
inner join (*Second Query*) as B on A.Hora = B.Hora
The end result being:
Select A.Hora,A.Movimentações,B.Sucesso
From (SELECT
(
CAST(DATEPART(HOUR, m.Ocr_DataHora) AS NVARCHAR) +
':' +
CAST((DATEPART(MINUTE, m.Ocr_DataHora) % 6) AS NVARCHAR) +
'0'
) AS Hora,
COUNT(*) AS Movimentações
FROM
Integracao m
WHERE
m.Ocr_DataHora >= '2012-09-17 00:00:00.000'
AND m.Ocr_DataHora < '2012-09-18 00:00:00.000'
GROUP BY
DATEPART(HOUR, m.Ocr_DataHora),
(DATEPART(MINUTE, m.Ocr_DataHora) % 6)
ORDER BY
DATEPART(HOUR, m.Ocr_DataHora),
(DATEPART(MINUTE, m.Ocr_DataHora) % 6)) As A
inner join (SELECT
(
CAST(DATEPART(HOUR, s.Ocr_DataHora) AS NVARCHAR) +
':' +
CAST((DATEPART(MINUTE, s.Ocr_DataHora) % 6) AS NVARCHAR) +
'0'
) AS Hora,
COUNT(*) AS Sucesso
FROM
Integracao s
WHERE
s.Veiculo_Modelo <> ''
AND s.Ocr_DataHora >= '2012-09-17 00:00:00.000'
AND s.Ocr_DataHora < '2012-09-18 00:00:00.000'
GROUP BY
DATEPART(HOUR, s.Ocr_DataHora),
(DATEPART(MINUTE, s.Ocr_DataHora) % 6)) As B on B.Hora = A.Hora