En løsning på denne form for forespørgsel involverer to dele:kategorigenerering efterfulgt af aggregering i de genererede kategorier.
For de data, du har angivet, er det første trin i denne form for løsning at samle dataene efter time (da de data, du har angivet, ikke har nogen hændelser i 02:00-timerne eller 04:00-timerne, for at vise disse timer i det endelige resultat kan de genereres i stedet).
Det andet stykke er at aggregere i per-time buckets via en pivot , som nævnt af Jorge Campos i kommentarerne.
Nedenfor er et eksempel.
Opret først en testtabel:
CREATE TABLE INSERT_TIME_STATUS(
INSERT_TIME TIMESTAMP,
STATUS VARCHAR2(128)
);
Og tilføj testdata:
INSERT INTO INSERT_TIME_STATUS VALUES (TIMESTAMP '2017-01-01 00:00:00', 'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (TIMESTAMP '2017-01-01 00:15:00', 'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (TIMESTAMP '2017-01-01 00:30:00', 'NOT AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (TIMESTAMP '2017-01-01 01:30:00', 'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (TIMESTAMP '2017-01-01 03:10:00', 'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (TIMESTAMP '2017-01-01 05:00:00', 'NOT AVAILABLE');
Opret derefter forespørgslen. Dette vil bruge subquery factoring til at skitsere den to-trins karakter af denne proces.
CALENDAR underfaktor her vil generere hver time på dagen, uanset om der er sket nogen registreringer i løbet af den time.
HOUR_CALENDAR subfactor vil tildele hver givet status-rekord til en specifik time, og vil hakke statusser, der krydser til en anden time i stykker, så alle poster passer inden for en time-span.
DURATION_IN_STATUS underfaktor vil tælle, hvor mange minutter hver status var aktiv i løbet af hver time.
Den endelige forespørgsel vil PIVOT at aggregere (SUM ) mængden af tid hver STATUS var aktiv i hver time.
WITH HOUR_OF_DAY AS (SELECT LEVEL - 1 AS THE_HOUR
FROM DUAL
CONNECT BY LEVEL < 25),
CALENDAR AS (SELECT DAY_START
FROM (
SELECT (TIMESTAMP '2017-01-01 00:00:00' + NUMTODSINTERVAL(DATE_INCREMENT.OFFSET, 'DAY')) AS DAY_START
FROM (SELECT LEVEL - 1 AS OFFSET
FROM DUAL
CONNECT BY LEVEL < 9999) DATE_INCREMENT)
WHERE DAY_START BETWEEN (SELECT MIN(TRUNC(INSERT_TIME_STATUS.INSERT_TIME))
FROM INSERT_TIME_STATUS)
AND (SELECT MAX(TRUNC(INSERT_TIME_STATUS.INSERT_TIME))
FROM INSERT_TIME_STATUS)),
HOUR_CALENDAR AS (
SELECT
TO_CHAR(CALENDAR.DAY_START, 'MM/DD/YYYY') AS THE_DAY,
HOUR_OF_DAY.THE_HOUR,
CALENDAR.DAY_START + NUMTODSINTERVAL(HOUR_OF_DAY.THE_HOUR, 'HOUR') AS HOUR_START,
(SELECT MAX(INSERT_TIME_STATUS.STATUS)
KEEP (DENSE_RANK LAST
ORDER BY INSERT_TIME_STATUS.INSERT_TIME ASC)
FROM INSERT_TIME_STATUS
WHERE INSERT_TIME_STATUS.INSERT_TIME <= DAY_START + NUMTODSINTERVAL(THE_HOUR, 'HOUR')) AS HOUR_START_STATUS
FROM CALENDAR
CROSS JOIN HOUR_OF_DAY),
ALL_HOUR_STATUS AS (
SELECT
HOUR_CALENDAR.THE_DAY,
HOUR_CALENDAR.THE_HOUR,
HOUR_CALENDAR.HOUR_START AS THE_TIME,
HOUR_CALENDAR.HOUR_START_STATUS AS THE_STATUS
FROM HOUR_CALENDAR
UNION ALL
SELECT
HOUR_CALENDAR.THE_DAY,
HOUR_CALENDAR.THE_HOUR,
INSERT_TIME_STATUS.INSERT_TIME AS THE_TIME,
INSERT_TIME_STATUS.STATUS AS THE_STATUS
FROM HOUR_CALENDAR
INNER JOIN INSERT_TIME_STATUS
ON HOUR_CALENDAR.HOUR_START < INSERT_TIME_STATUS.INSERT_TIME
AND HOUR_CALENDAR.THE_HOUR = EXTRACT(HOUR FROM INSERT_TIME_STATUS.INSERT_TIME)),
DURATION_IN_STATUS AS (
SELECT
ALL_HOUR_STATUS.THE_DAY,
ALL_HOUR_STATUS.THE_HOUR,
ALL_HOUR_STATUS.THE_STATUS,
(EXTRACT(HOUR FROM
(COALESCE(LEAD(THE_TIME)
OVER (
PARTITION BY NULL
ORDER BY THE_TIME ASC ), TO_TIMESTAMP(THE_DAY, 'MM/DD/YYYY') + NUMTODSINTERVAL(THE_HOUR + 1, 'HOUR')) - THE_TIME)) * 60)
+
EXTRACT(MINUTE FROM
(COALESCE(LEAD(THE_TIME)
OVER (
PARTITION BY NULL
ORDER BY THE_TIME ASC ), TO_TIMESTAMP(THE_DAY, 'MM/DD/YYYY') + NUMTODSINTERVAL(THE_HOUR + 1, 'HOUR')) - THE_TIME))
AS DURATION_IN_STATUS
FROM ALL_HOUR_STATUS)
SELECT
THE_DAY,
THE_HOUR,
COALESCE(AVAILABLE, 0) AS AVAILABLE,
COALESCE(NOT_AVAILABLE, 0) AS NOT_AVAILABLE,
COALESCE(BUSY, 0) AS BUSY
FROM DURATION_IN_STATUS
PIVOT (SUM(DURATION_IN_STATUS)
FOR THE_STATUS
IN ('AVAILABLE' AS AVAILABLE, 'NOT AVAILABLE' AS NOT_AVAILABLE, 'BUSY' AS BUSY)
)
ORDER BY THE_DAY ASC, THE_HOUR ASC;
Resultat:
THE_DAY THE_HOUR AVAILABLE NOT_AVAILABLE BUSY
01/01/2017 0 15 30 15
01/01/2017 1 30 30 0
01/01/2017 2 60 0 0
01/01/2017 3 10 0 50
01/01/2017 4 0 0 60
01/01/2017 5 0 60 0
01/01/2017 6 0 60 0
01/01/2017 7 0 60 0
01/01/2017 8 0 60 0
01/01/2017 9 0 60 0
01/01/2017 10 0 60 0
01/01/2017 11 0 60 0
01/01/2017 12 0 60 0
01/01/2017 13 0 60 0
01/01/2017 14 0 60 0
01/01/2017 15 0 60 0
01/01/2017 16 0 60 0
01/01/2017 17 0 60 0
01/01/2017 18 0 60 0
01/01/2017 19 0 60 0
01/01/2017 20 0 60 0
01/01/2017 21 0 60 0
01/01/2017 22 0 60 0
01/01/2017 23 0 60 0
24 rows selected.
Dette eksempelforespørgsel genererer poster for hele dagen. Så den sidste status for NOT AVAILABLE fører igennem. Hvis du ønsker at stoppe på tidspunktet for den sidst tildelte status, kan denne adfærd justeres efter behov.
EDIT, som svar på din opdatering for at evaluere disse tidspunkter pr. channel_id og user_id , her er et andet eksempel:
Opret først testtabellen:
CREATE TABLE INSERT_TIME_STATUS(
USER_ID NUMBER,
CHANNEL_ID NUMBER,
INSERT_TIME TIMESTAMP,
STATUS VARCHAR2(128)
);
Og indlæs det (her er user_id=1 på kanal 3 og 4 og user_id=2 er kun på kanal 3):
INSERT INTO INSERT_TIME_STATUS VALUES (1111,3,TO_TIMESTAMP('1/1/2017 0:00','MM/DD/YYYY HH24:MI'),'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,3,TO_TIMESTAMP('1/1/2017 0:15','MM/DD/YYYY HH24:MI'),'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,3,TO_TIMESTAMP('1/1/2017 0:30','MM/DD/YYYY HH24:MI'),'NOT AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,3,TO_TIMESTAMP('1/1/2017 1:30','MM/DD/YYYY HH24:MI'),'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,3,TO_TIMESTAMP('1/1/2017 3:10','MM/DD/YYYY HH24:MI'),'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,3,TO_TIMESTAMP('1/1/2017 5:00','MM/DD/YYYY HH24:MI'),'NOT AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,4,TO_TIMESTAMP('1/1/2017 0:00','MM/DD/YYYY HH24:MI'),'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,4,TO_TIMESTAMP('1/1/2017 0:15','MM/DD/YYYY HH24:MI'),'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,4,TO_TIMESTAMP('1/1/2017 0:30','MM/DD/YYYY HH24:MI'),'NOT AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,4,TO_TIMESTAMP('1/1/2017 1:30','MM/DD/YYYY HH24:MI'),'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,4,TO_TIMESTAMP('1/1/2017 3:10','MM/DD/YYYY HH24:MI'),'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (1111,4,TO_TIMESTAMP('1/1/2017 5:00','MM/DD/YYYY HH24:MI'),'NOT AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (2222,3,TO_TIMESTAMP('1/1/2017 0:00','MM/DD/YYYY HH24:MI'),'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (2222,3,TO_TIMESTAMP('1/1/2017 0:15','MM/DD/YYYY HH24:MI'),'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (2222,3,TO_TIMESTAMP('1/1/2017 0:30','MM/DD/YYYY HH24:MI'),'NOT AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (2222,3,TO_TIMESTAMP('1/1/2017 1:30','MM/DD/YYYY HH24:MI'),'AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (2222,3,TO_TIMESTAMP('1/1/2017 3:10','MM/DD/YYYY HH24:MI'),'BUSY');
INSERT INTO INSERT_TIME_STATUS VALUES (2222,3,TO_TIMESTAMP('1/1/2017 5:00','MM/DD/YYYY HH24:MI'),'NOT AVAILABLE');
INSERT INTO INSERT_TIME_STATUS VALUES (2222,3,TO_TIMESTAMP('1/1/2017 5:00','MM/DD/YYYY HH24:MI'),'NOT AVAILABLE');
Opdater derefter forespørgslen for at generere data pr. user_id pr-channel_id . I dette eksempel er data inkluderet for alle tider, for alle kanaler, hver bruger er involveret i. bruger 1 vil have tællinger for hver time på dagen for kanalerne 3 og 4 mens bruger-2 kun vil have tællinger for hver time på dagen for kanal 3 (hvis den havde optagelser på en anden kanal, er den kanal også inkluderet).
WITH HOUR_OF_DAY AS (SELECT LEVEL - 1 AS THE_HOUR
FROM DUAL
CONNECT BY LEVEL < 25),
CALENDAR AS (SELECT DAY_START
FROM (
SELECT ((SELECT MIN(TRUNC(INSERT_TIME_STATUS.INSERT_TIME))
FROM INSERT_TIME_STATUS) + NUMTODSINTERVAL(DATE_INCREMENT.OFFSET, 'DAY')) AS DAY_START
FROM (SELECT LEVEL - 1 AS OFFSET
FROM DUAL
CONNECT BY LEVEL < 9999) DATE_INCREMENT)
WHERE DAY_START BETWEEN (SELECT MIN(TRUNC(INSERT_TIME_STATUS.INSERT_TIME))
FROM INSERT_TIME_STATUS)
AND (SELECT MAX(TRUNC(INSERT_TIME_STATUS.INSERT_TIME))
FROM INSERT_TIME_STATUS)),
USER_CHANNEL_HOUR_CALENDAR AS (
SELECT
USER_ID,
CHANNEL_ID,
CALENDAR.DAY_START,
TO_CHAR(CALENDAR.DAY_START, 'MM/DD/YYYY') AS THE_DAY,
HOUR_OF_DAY.THE_HOUR,
CALENDAR.DAY_START + NUMTODSINTERVAL(HOUR_OF_DAY.THE_HOUR, 'HOUR') AS HOUR_START
FROM CALENDAR
CROSS JOIN HOUR_OF_DAY
--
CROSS JOIN (SELECT UNIQUE USER_ID, CHANNEL_ID FROM INSERT_TIME_STATUS)
),
HOUR_CALENDAR AS (
SELECT USER_ID,
CHANNEL_ID,
THE_DAY,
THE_HOUR,
DAY_START,
HOUR_START,
(SELECT MAX(INSERT_TIME_STATUS.STATUS)
KEEP (DENSE_RANK LAST
ORDER BY INSERT_TIME_STATUS.INSERT_TIME ASC)
FROM INSERT_TIME_STATUS
WHERE INSERT_TIME_STATUS.INSERT_TIME <= DAY_START + NUMTODSINTERVAL(THE_HOUR, 'HOUR')
AND INSERT_TIME_STATUS.USER_ID = USER_ID
AND INSERT_TIME_STATUS.CHANNEL_ID = CHANNEL_ID) AS HOUR_START_STATUS
FROM USER_CHANNEL_HOUR_CALENDAR),
ALL_HOUR_STATUS AS (
SELECT
HOUR_CALENDAR.USER_ID,
HOUR_CALENDAR.CHANNEL_ID,
HOUR_CALENDAR.THE_DAY,
HOUR_CALENDAR.THE_HOUR,
HOUR_CALENDAR.HOUR_START AS THE_TIME,
HOUR_CALENDAR.HOUR_START_STATUS AS THE_STATUS
FROM HOUR_CALENDAR
UNION ALL
SELECT
INSERT_TIME_STATUS.USER_ID,
INSERT_TIME_STATUS.CHANNEL_ID,
HOUR_CALENDAR.THE_DAY,
HOUR_CALENDAR.THE_HOUR,
INSERT_TIME_STATUS.INSERT_TIME AS THE_TIME,
INSERT_TIME_STATUS.STATUS AS THE_STATUS
FROM HOUR_CALENDAR
INNER JOIN INSERT_TIME_STATUS
ON HOUR_CALENDAR.HOUR_START < INSERT_TIME_STATUS.INSERT_TIME
AND HOUR_CALENDAR.THE_HOUR = EXTRACT(HOUR FROM INSERT_TIME_STATUS.INSERT_TIME)
AND HOUR_CALENDAR.USER_ID = INSERT_TIME_STATUS.USER_ID
AND HOUR_CALENDAR.CHANNEL_ID = INSERT_TIME_STATUS.CHANNEL_ID),
DURATION_IN_STATUS AS (
SELECT
ALL_HOUR_STATUS.USER_ID,
ALL_HOUR_STATUS.CHANNEL_ID,
ALL_HOUR_STATUS.THE_DAY,
ALL_HOUR_STATUS.THE_HOUR,
ALL_HOUR_STATUS.THE_STATUS,
(EXTRACT(HOUR FROM
(COALESCE(LEAD(THE_TIME)
OVER (
PARTITION BY USER_ID, CHANNEL_ID
ORDER BY THE_TIME ASC ), TO_TIMESTAMP(THE_DAY, 'MM/DD/YYYY') + NUMTODSINTERVAL(THE_HOUR + 1, 'HOUR')) - THE_TIME)) * 60)
+
EXTRACT(MINUTE FROM
(COALESCE(LEAD(THE_TIME)
OVER (
PARTITION BY USER_ID, CHANNEL_ID
ORDER BY THE_TIME ASC ), TO_TIMESTAMP(THE_DAY, 'MM/DD/YYYY') + NUMTODSINTERVAL(THE_HOUR + 1, 'HOUR')) - THE_TIME))
AS DURATION_IN_STATUS
FROM ALL_HOUR_STATUS)
SELECT
USER_ID,
CHANNEL_ID,
THE_DAY,
THE_HOUR,
COALESCE(AVAILABLE, 0) AS AVAILABLE,
COALESCE(NOT_AVAILABLE, 0) AS NOT_AVAILABLE,
COALESCE(BUSY, 0) AS BUSY
FROM DURATION_IN_STATUS
PIVOT (SUM(DURATION_IN_STATUS)
FOR THE_STATUS
IN ('AVAILABLE' AS AVAILABLE, 'NOT AVAILABLE' AS NOT_AVAILABLE, 'BUSY' AS BUSY)
)
-- You can additionally filter the result
-- WHERE CHANNEL_ID IN (3,4)
-- WHERE USER_ID = 12345
-- WHERE THE_DAY > TO_CHAR(DATE '2017-01-01')
-- etc.
ORDER BY USER_ID ASC, CHANNEL_ID ASC, THE_DAY ASC, THE_HOUR ASC;
Så test det:
USER_ID CHANNEL_ID THE_DAY THE_HOUR AVAILABLE NOT_AVAILABLE BUSY
1111 3 01/01/2017 0 15 30 15
1111 3 01/01/2017 1 30 30 0
1111 3 01/01/2017 2 60 0 0
1111 3 01/01/2017 3 10 0 50
1111 3 01/01/2017 4 0 0 60
1111 3 01/01/2017 5 0 60 0
1111 3 01/01/2017 6 0 60 0
...
1111 3 01/01/2017 23 0 60 0
1111 4 01/01/2017 0 15 30 15
1111 4 01/01/2017 1 30 30 0
1111 4 01/01/2017 2 60 0 0
1111 4 01/01/2017 3 10 0 50
1111 4 01/01/2017 4 0 0 60
1111 4 01/01/2017 5 0 60 0
1111 4 01/01/2017 6 0 60 0
...
1111 4 01/01/2017 23 0 60 0
2222 3 01/01/2017 0 15 30 15
2222 3 01/01/2017 1 30 30 0
2222 3 01/01/2017 2 60 0 0
2222 3 01/01/2017 3 10 0 50
2222 3 01/01/2017 4 0 0 60
2222 3 01/01/2017 5 0 60 0
2222 3 01/01/2017 6 0 60 0