Hola martini002.
No he usado SQLite pero en esta página
Datatypes In SQLite, encontré esto:
Cita:
1.2 Date and Time Datatype
SQLite does not have a storage class set aside for storing dates and/or times. Instead, the built-in Date And Time Functions of SQLite are capable of storing dates and times as TEXT, REAL, or INTEGER values:- TEXT as ISO8601 strings ("YYYY-MM-DD HH:MM:SS.SSS").
- REAL as Julian day numbers, the number of days since noon in Greenwich on November 24, 4714 B.C. according to the proleptic Gregorian calendar.
- INTEGER as Unix Time, the number of seconds since 1970-01-01 00:00:00 UTC.
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También revisa si te sirve de guía el título "
Reformat Date Strings from mm/dd/yyyy to the Standard SQLite Datestring Format of yyyy-mm-dd Using SELECT CASE" dentro de este
enlace.
Saludos.