Insert Or Ignore In SQLite
CREATE TABLE example_table(example_item TEXT UNIQUE);
Then do this:
INSERT OR IGNORE
INTO example_table(example_item)
VALUES("alfa bravo");
Note that with this approach an AUTOINCREMENT counter increases even if a row isn't inserted. If that bugs you, you can either not use AUTOINCREMENT (e.g. use the generic ROWID) or use a different approach.
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