It is given its own section in this document because it is not part of standard SQL and therefore might not be familiar. UPSERT is not standard SQL. The CONFLICT clause is a powerful clause to resolve any conflict between the data and the data to modify. WHERE true to solve parser ambiguity about the token ON with the join syntax. Conflict Resolution Algorithms.
SQLite defines five constraint conflict resolution algorithms as follows: ROLLBACK.
When a constraint violation occurs, an immediate ROLLBACK occurs, thus ending the current transaction, and the command aborts with a return code of SQLITE _CONSTRAINT. Insert duplicate primary key column. If we want to insert such a row in which the value of primary key column already exists, then see the result.
The optional OR action conflict clause that follows the UPDATE keyword allows the user to nominate a specific constraint conflict resolution algorithm to use during this one UPDATE command. WHERE condition – update some fields in the table. DO UPDATE SET column_= value_.
If you are using an earlier version, you will need a workaround to have the upsert feature. First, the position with id already exists, the REPLACE statement removes it.