Multiple PIVOTS? Need to count by Hour Per Month - sql-server

Question

This should be pretty simple. I have other PIVOT SQL queries working fine. I want to count logins: by hour, by month. I am thinking two PIVOTs or UNPIVOT and then PIVOT? Yes, I have dug around here, other sites, Google, etc. I am pretty stuck.
SELECT
loginid
,DATEPART(MONTH,logtime) Month
, DATEPART(HOUR, logtime) Hour
FROM somelog (nolock)
) temp
PIVOT (
COUNT(loginid)
FOR Month in (JAN,FEB,MAR,APR,MAY,JUN,JUL,AUG,SEP,OCT,NOV,DEC)
) AS Pvt
What I want the results to be..
HOUR,JAN,FEB,MAR
00
01
02
..
23
and I don't need 8760 (365 x 24) of them
I have tried GROUP BY HOUR
I have tried GROUP BY temp.hour
I have also tried this as well.. It does seem to work, but I get Hour 00 for example 365 times.. Again, the GROUP BY issue..
SELECT
TimeOfDay
, [1] JAN
, [2] FEB
, [3] MAR
, [4] APR
, [5] MAY
, [6] JUN
, [7] JUL
, [8] AUG
, [9] SEP
, [10] OCT
, [11] NOV
, [12] DEC
FROM (SELECT logintime
, loginid
, datepart(month, logintime) [month]
, DatePart(hour, logintime) TimeOfDay
FROM sometable (nolock)) x
PIVOT (
COUNT(loginid)
for [month] in ([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12])
) AS pvt
ORDER BY 1, 2
Thanks,
Kent

Answer 1

One way to do it
WITH hour_list AS (
SELECT 0 hour
UNION ALL
SELECT hour + 1 FROM hour_list WHERE hour < 23
)
SELECT h.hour,
COALESCE(jan, 0) jan,
COALESCE(feb, 0) feb,
COALESCE(mar, 0) mar,
COALESCE(apr, 0) apr,
COALESCE(may, 0) may,
COALESCE(jun, 0) jun,
COALESCE(jul, 0) jul,
COALESCE(aug, 0) aug,
COALESCE(sep, 0) sep,
COALESCE(oct, 0) oct,
COALESCE(nov, 0) nov,
COALESCE(dec, 0) dec
FROM hour_list h LEFT JOIN
(
SELECT DATEPART(HOUR, logtime) hour,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 1 THEN 1 END) jan,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 2 THEN 1 END) feb,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 3 THEN 1 END) mar,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 4 THEN 1 END) apr,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 5 THEN 1 END) may,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 6 THEN 1 END) jun,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 7 THEN 1 END) jul,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 8 THEN 1 END) aug,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 9 THEN 1 END) sep,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 10 THEN 1 END) oct,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 11 THEN 1 END) nov,
SUM(CASE WHEN DATEPART(MONTH, logtime) = 12 THEN 1 END) dec
FROM somelog (NOLOCK)
GROUP BY DATEPART(HOUR, logtime)
) l
ON h.hour = l.hour
or with PIVOT
WITH hour_list AS (
SELECT 0 hour
UNION ALL
SELECT hour + 1 FROM hour_list WHERE hour < 23
)
SELECT h.hour,
COALESCE([1], 0) jan,
COALESCE([2], 0) feb,
COALESCE([3], 0) mar,
COALESCE([4], 0) apr,
COALESCE([5], 0) may,
COALESCE([6], 0) jun,
COALESCE([7], 0) jul,
COALESCE([8], 0) aug,
COALESCE([9], 0) sep,
COALESCE([10], 0) oct,
COALESCE([11], 0) nov,
COALESCE([12], 0) dec
FROM hour_list h LEFT JOIN
(
SELECT DATEPART(MONTH, logtime) month,
DATEPART(HOUR, logtime) hour,
COUNT(*) log_count
FROM somelog (NOLOCK)
GROUP BY DATEPART(MONTH, logtime), DATEPART(HOUR, logtime)
) s
PIVOT
(
SUM(log_count) FOR month IN([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12])
) p
ON h.hour = p.hour
Sample output for both queries:
| HOUR | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
|------|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|
| 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 4 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
...
Here is SQLFiddle demo (using CASE)
Here is SQLFiddle demo (using PIVOT)