SQLite INSERT - ON DUPLICATE KEY UPDATE (UPSERT)
MySQL has something like this:
INSERT INTO visits (ip, hits)
VALUES ('127.0.0.1', 1)
ON DUPLICATE KEY UPDATE hits = hits + 1;
As far as I know this feature doesn't exist in SQLite, what I want to know is if there is any way to achive the same effect without having to execute two queries. Also, if this is not possible, what do you prefer:
- SELECT + (INSERT or UPDATE) or
- UPDATE (+ INSERT if UPDATE fails)
Solution 1:
INSERT OR IGNORE INTO visits VALUES ($ip, 0);
UPDATE visits SET hits = hits + 1 WHERE ip LIKE $ip;
This requires the "ip" column to have a UNIQUE (or PRIMARY KEY) constraint.
EDIT: Another great solution: https://stackoverflow.com/a/4330694/89771.
Solution 2:
Since 3.24.0 SQLite also supports upsert, so now you can simply write the following
INSERT INTO visits (ip, hits)
VALUES ('127.0.0.1', 1)
ON CONFLICT(ip) DO UPDATE SET hits = hits + 1;