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I have a table in SQLite 3:
CREATE TABLE foo
(
bar TEXT
);
It always has 0 or 1 rows. I want to write a query which updates the row if there is 1 row and adds the row if there are 0. What is the cleanest way to do it?
Take the approach described here, giving the table a primary key, and using the
INSERT OR IGNOREsyntax, always using the same key value.