Combining SQL querys in to one query - sql

Question

Hi i have a set of querys for getting data
two counting rows for the day and two for night, what i would like is to combine these in to one query.
SELECT controllerID
,COUNT(CardID) AS GoodCountDay
FROM ReaderData
WHERE (
ReaderTime BETWEEN '08:00:00'
AND '20:00:00'
)
AND (CardID = 'fffffff0')
AND (DATEDIFF(DAY, DATEADD(DAY, - 0, CURRENT_TIMESTAMP), dtReading) = 0)
GROUP BY controllerID
SELECT controllerID
,COUNT(CardID) AS ScrapCountDay
FROM ReaderData
WHERE (
ReaderTime BETWEEN '08:00:00'
AND '20:00:00'
)
AND (CardID = '007CF00B')
AND (DATEDIFF(DAY, DATEADD(DAY, - 0, CURRENT_TIMESTAMP), dtReading) = 0)
GROUP BY controllerID
SELECT controllerID
,COUNT(CardID) AS GoodCountNight
FROM ReaderData
WHERE (dtReading >= DATEADD(hour, 20, DATEADD(day, - 1, CAST(CAST(GETDATE() AS DATE) AS DATETIME))))
AND (dtReading < DATEADD(hour, 8, CAST(CAST(GETDATE() AS DATE) AS DATETIME)))
GROUP BY controllerID
SELECT controllerID
,count(CardID) AS ScrapCountNight
FROM ReaderData
WHERE dtReading >= dateadd(hour, 20, dateadd(day, - 1, cast(cast(getdate() AS DATE) AS DATETIME)))
AND dtReading < dateadd(hour, 8, cast(cast(getdate() AS DATE) AS DATETIME))
AND (CardID = '007CF00B')
GROUP BY controllerID
All of these querys have the same out put which looks like this
controllerID GoodCountDay
2 207
28 245
30 267
33 314
35 471
37 65
38 17
40 175
Is there any way i can combine these in to one query so the out put will be such
controllerID GoodCountDay ScrapCountDay GoodCountNight ScrapCountNight
2 207 12 123 1
28 245 123
30 267
33 314
35 471
37 65
38 17
40 175

Answer 1

You can use conditional aggregation:
SELECT controllerID,
SUM(CASE WHEN ReaderTime BETWEEN '08:00:00' AND '20:00:00' AND
DATEDIFF(DAY, DATEADD(DAY, - 0, CURRENT_TIMESTAMP), dtReading) = 0) AND
CardID = 'fffffff0' THEN 1 ELSE 0 END) as GoodCountDay
SUM(CASE WHEN ReaderTime BETWEEN '08:00:00' AND '20:00:00' AND
DATEDIFF(DAY, DATEADD(DAY, - 0, CURRENT_TIMESTAMP), dtReading) = 0) AND
CardID = '007CF00B' THEN 1 ELSE 0 END) as ScrapCountDay,
SUM(CASE WHEN dtReading >= DATEADD(hour, 20, DATEADD(day, - 1, CAST(CAST(GETDATE() AS date) AS datetime)))) AND
(dtReading < DATEADD(hour, 8, CAST(CAST(GETDATE() AS date) AS datetime)) AND
CardID = 'fffffff0' THEN 1 ELSE 0 END) as GoodCountNight
SUM(CASE WHEN dtReading >= DATEADD(hour, 20, DATEADD(day, - 1, CAST(CAST(GETDATE() AS date) AS datetime)))) AND
(dtReading < DATEADD(hour, 8, CAST(CAST(GETDATE() AS date) AS datetime)) AND
CardID = '007CF00B' THEN 1 ELSE 0 END) as ScrapCountNight
FROM ReaderData
group by controllerID;