Construire des dates à partir d'éléments

Analyse de séries temporelles dans SQL Server

Maham Faisal Khan

Senior Data Science Content Developer

Dates à partir d'éléments

DATEFROMPARTS(year, month, day)

TIMEFROMPARTS(hour, minute, second, fraction, precision)

DATETIMEFROMPARTS(year, month, day, hour, minute, second, ms)

DATETIME2FROMPARTS(year, month, day, hour, minute, second, fraction, precision)

SMALLDATETIMEFROMPARTS(year, month, day, hour, minute)

DATETIMEOFFSETFROMPARTS(year, month, day, hour, minute, second, fraction, hour_offset, minute_offset, precision)

Dates et heures ensemble

SELECT
    DATETIMEFROMPARTS(1918, 11, 11, 05, 45, 17, 995) AS DT,
    DATETIME2FROMPARTS(1918, 11, 11, 05, 45, 17, 0, 0) AS DT20,
    DATETIME2FROMPARTS(1918, 11, 11, 05, 45, 17, 995, 3) AS DT23,
    DATETIME2FROMPARTS(1918, 11, 11, 05, 45, 17, 9951234, 7) AS DT27;

DT	DT20	DT23	DT27
1918-11-11 05:45:17.997	1918-11-11 05:45:17	1918-11-11 05:45:17.995	1918-11-11 05:45:17.9951234

Gérer les décalages

SELECT
    DATETIMEOFFSETFROMPARTS(2009, 08, 14, 21, 
        00, 00, 0, 5, 30, 0) AS IST,
    DATETIMEOFFSETFROMPARTS(2009, 08, 14, 21,
        00, 00, 0, 5, 30, 0)
        AT TIME ZONE 'UTC' AS UTC;

IST	UTC
2009-08-14 21:00:00 +05:30	2009-08-14 15:30:00 +00:00

Pièges avec les éléments

DATEFROMPARTS(1999, 12, NULL)

DATEFROMPARTS(10000, 01, 01)

DATETIME2FROMPARTS(1918, 11, 11, 05, 45, 17, 995, 0)

NULL

Impossible de construire le type date : certains arguments ont des valeurs non valides.

Impossible de construire le type datetime2 : certains arguments ont des valeurs non valides.

Passons à la pratique !

Analyse de séries temporelles dans SQL Server