sqlite insert if not exists else update
If you have no primary key, You can insert if not exist, then do an update. The table must contain at least one entry before using this. "INSERT OR REPLACE" without the additional trickery in that answer will reset any fields you don't speci, Use INSERT OR REPLACE which does exactly what you want : insert a new row when the name does not exists or update otherwise.
| 相關軟體 SQLite 資訊 | |
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 sqlite insert if not exists else update 相關參考資料
"Insert if not exists" statement in SQLite - Stack Overflow
If you have a table called memos that has two columns id and text you should be able to do like this: INSERT INTO memos(id,text) SELECT 5, 'text to insert' ... https://stackoverflow.com INSERT IF NOT EXISTS ELSE UPDATE? - Stack Overflow
If you have no primary key, You can insert if not exist, then do an update. The table must contain at least one entry before using this. "INSERT OR REPLACE" without the additional trickery i... https://stackoverflow.com sql - Sqlite: Insert if not exist, Update if exist - Stack Overflow
Use INSERT OR REPLACE which does exactly what you want : insert a new row when the name does not exists or update otherwise. https://stackoverflow.com SQL: How to update or insert if doesn't exist? - Stack Overflow
I think this has been asked here before for sqlite: INSERT IF NOT EXISTS ELSE UPDATE? seems like they have a syntax for that: INSERT OR REPLACE INTO ... https://stackoverflow.com sqlite - INSERT IF NOT EXISTS ELSE UPDATE? - Stack Overflow
Note that any field not in the insert list will be set to NULL if the row already exists in the table. This is why there's a subselect for the ID column: ... https://stackoverflow.com SQLite REPLACE: Insert or Replace The Existing Row - SQLite Tutorial
http://www.sqlitetutorial.net SQLite UPSERT UPDATE OR INSERT - Stack Overflow
If you are trying to insert/update a player whose ID already exists, the ... be used (or at least I did not manage it) to perform one UPDATE query if ... https://stackoverflow.com Sqlite: Insert if not exist, Update if exist - Stack Overflow
Use INSERT OR REPLACE which does exactly what you want : insert a new row when the name does not exists or update otherwise. https://stackoverflow.com |