I'm using Python, PostgreSQL and psycopg2.. With an UPSERT. SQL: A basic UPSERT in PostgreSQL Tweet 0 Shares 0 Tweets 5 Comments. Merge two huge tables keeping only the unique rows. Active 1 year, 8 months ago. 3. I am doing bulk UPSERT on a table with 30 million rows. Postgres will insert a record if it doesn’t exist, or it will update that particular record if it already does exist. And so to compensate this something else needs to be used. Upsert the staging data into a big target table (5GB+), which also would need to have a PK, unique index or unique constraint to make the upsert possible. Npgsql.Bulk now supports this (PostgreSQL 9.5 or higher is required, offical documentation is here) To do that you can use a new syntax for Insert method, here are some examples: Bulk Insert, Update, Delete), Merge data into PostgreSQL from any source without installing driver … Ask Question Asked 1 year, 8 months ago. The table has just two columns (varchar as a primary key and integer). 2. Rails (ActiveRecord) is finally able to do efficient bulk import/upsert (at least for PostgreSQL adapter) on its own. Postgres bulk upsert performance. In this article, we’ll take a closer look at the PostgreSQL UPSERT keyword and check out some examples of its use. I have created a long list of tulpes that should be inserted to the database, sometimes with modifiers like geometric Simplify.. When doing upserts in PostgreSQL 9.5+ you must refer to the excluded data (that which failed to insert) by the alias excluded.Also, the on conflict option must refer to the key: (pk_b) rather than (b).Eg. Oracle 10g: Optimizing an update query that uses a subquery. Upsert is relatively new operation (but very useful) so it is not supported nicely in Entity Framework yet. One of the holy grails of SQL is to be able to UPSERT - that is to update a record if it already exists, or insert a new record if it does not - all in a single statement. It took some time (there are Rails issues more than 4 … The naive way to do it would be string-formatting a list of INSERT statements, but there are three other methods I've read about: Lately I have been working a lot with Postgresql and NodeJS. 7 JANUARY 2016: The PostgreSQL Global Development Group announces the release of PostgreSQL 9.5.This release adds UPSERT capability, Row Level Security, and multiple Big Data features, which will broaden the user base for the world's most advanced database. Viewed 4k times 4. 3. Bulk upsert of … I'm looking for the most efficient way to bulk-insert some millions of tuples into a database. Postgres bulk upsert performance. insert into table_b (pk_b, b) select pk_a,a from table_a on conflict (pk_b) do update set b=excluded.b; One of the latest requirements I have faced is a CHALLENGE! See more linked questions. 2. Hello people! 11. Best way to re-import large amount of data with minimal downtime. Related. 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