SQLite REPLACE Insert or Replace The Existing Row
The idea of the REPLACE statement is that when a UNIQUE or PRIMARY KEY constraint violation occurs it does the following First delete the existing row that causes a constraint violation Second insert a new row
SQLite bulk INSERT benchmarking and optimization Zero Width Joiner, Ask the Internet about SQLite INSERT performance and the first answer you will get is wrap multiple INSERTs in a single transaction It s is a very good advice so I will not bother testing independent INSERTs There is also a lot of writings about using various PRAGMA directives to consistency and safety for performance This is your call
INSERT SQLite
The initial INSERT keyword can be replaced by REPLACE or INSERT OR action to specify an alternative constraint conflict resolution algorithm to use during that one INSERT command For compatibility with MySQL the parser allows the use of the single keyword REPLACE as an alias for INSERT OR REPLACE
Squeezing Performance from SQLite Insertions Medium, It s important to note that SQLite only writes the inserts to disk once the transaction has been committed Therefore if you can minimize the number of transactions regardless of whether
The SQLite Query Optimizer Overview
The SQLite Query Optimizer Overview, This document provides an overview of how the query planner and optimizer for SQLite works Given a single SQL statement there might be dozens hundreds or even thousands of ways to implement that statement depending on the complexity of the statement itself and of the underlying database schema The task of the query planner is to select
SQLite INSERT OR REPLACE
REPLACE SQLite
REPLACE SQLite REPLACE The REPLACE command is an alias for the INSERT OR REPLACE variant of the INSERT command This alias is provided for compatibility other SQL database engines See the INSERT command documentation for additional information
SQLite UPSERT not INSERT Or REPLACE Read For Learn
Improve INSERT per second performance of SQLite Solutons Several tips Put inserts updates in a transaction For older versions of SQLite Consider a less paranoid journal mode pragma journal mode Improve INSERT per second performance of SQLite HackerThink. 1 If it is possible with sqlite in one sql statement Yes it is possible The UPSERT statement has been nicely discussed in this ion I mean in real sutiations IDs are near to random and as I know the performance is not as bad as mine Even if they are enclosed in a single transaction every UPDATE is executed singularly This means that for every UPDATE sqlite has to find the page that contains the row with the specified ID read it modify it and then write it to disk
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