Datumstrings vertalen

Tijdreeksanalyse in SQL Server

Maham Faisal Khan

Senior Data Science Content Developer

Strings casten

SELECT
    CAST('09/14/99' AS DATE) AS USDate;

USDate
1999-09-14

Strings converteren

SELECT
    CONVERT(DATETIME2(3),
            'April 4, 2019 11:52:29.998 PM') AS April4

April4
2019-04-04 23:52:29.998

Strings parsen

SELECT
    PARSE('25 Dezember 2014' AS DATE 
          USING 'de-de') AS Weihnachten;

Weihnachten
2014-12-25

De kosten van parsen

Functie	Conversies per seconde
`CONVERT()`	251.997
`CAST()`	240.347
`PARSE()`	12.620

Talen instellen

SET LANGUAGE 'FRENCH'
DECLARE
    @FrenchDate NVARCHAR(30) = N'18 avril 2019',
    @FrenchNumberDate NVARCHAR(30) = N'18/4/2019';

SELECT
    CAST(@FrenchDate AS DATETIME),
    CAST(@FrenchNumberDate  AS DATETIME);

2019-04-18 00:00:00.000

Laten we oefenen!

Tijdreeksanalyse in SQL Server