SQLite 插入 - 重复键更新 (UPSERT) [英] SQLite INSERT - ON DUPLICATE KEY UPDATE (UPSERT)
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问题描述
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)
解决方案
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;
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