Saving parts of an SQLITE database to a new file

[ChrisW67]

You could try the SQLite ATTACH DATABASE command to attach another (empty) database and then use basic SQL to move the data. Something like:

ATTACH DATABASE filename AS newdb;
CREATE TABLE newdb.tablename AS SELECT * FROM tablename WHERE timeframe conditions;

ATTACH DATABASE filename AS newdb;
CREATE TABLE newdb.tablename AS SELECT * FROM tablename WHERE timeframe conditions;

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You may need the new table to have a different name.