If you’re looking to bulk-load tables, also check out the COPY command, which can be used to insert rows from a text or CSV file. This option instructs PostgreSQL to add the new column only if the column name does not exist in the table. Now, if an entry with psql technology exists then we have to update the client count of that entry to 100 else insert the record with psql technology. I’ll do a test case on this below. Re: Conditional INSERT: if not exists at 2006-08-23 20:57:44 from Bruno Wolff III Re: Conditional INSERT: if not exists at 2006-10-05 07:07:05 from Stuart Bishop Browse pgsql-novice by date In this article, we’ll take a closer look at the Postgres ADD COLUMN IF NOT EXISTS command and check out some examples of its use. Would it be feasible, using your suggestion, to simply put in two SQL statements, in the same query - first UPDATE when EXISTS, then INSERT when NOT EXISTS, to accomplist this in one go ? If the updated data does not exist, it is inserted to the database. How do I use the (NOT) EXISTS or (NOT) IN clause ? Previously, we have to use upsert or merge statement to do this kind of operation. After a long time of waiting, PostgreSQL 9.5 introduced INSERT ON CONFLICT [DO UPDATE] [DO NOTHING]. Delete and Return Deleted Information You can use the RETURNING clause to return values from the rows that were deleted using a bulk-delete statement: 0.00/5 (No votes) See more: SQL. I’ll use the same file to load the data as in the previous post. > My problem: if the insert fails because the value already exists, then > this starts a rollback of my entire transaction. Check the sample: If the table exists, you get a message like a table already exists. Some notes about indexes and foreign keys: It is usually faster to create the indexes and foreign keys after the bulk load and to delete or disable them before the load. Please Sign up or sign in to vote. My project is in C# and I'm using PostgreSQL 9.3 with npgsql.dll 2.0.14. I have also published an article on it. Because, before PostgreSQL 9.1 this was not there and still they perception is the same. Hi, When I'm using the query Re: Conditional INSERT: if not exists at 2006-08-23 18:57:55 from Franck Routier; Responses. And even not changing there old code or script. If you know there won't be concurrent inserts or deletes affecting the row of interest there is a way to do this in the INSERT statement. ... table. In this case, you can use a combination of bulk delete and bulk insert. The fastest method to load or unload data in PostgreSQL is the copy command. Code: DO $$ BEGIN IF EXISTS (SELECT FROM educational_platforms WHERE technology='psql') THEN The solution I'm. This option basically helps to perform DML actions like, Insert IF not Exists, Update IF Exists. Now, TABLE IF NOT EXISTS is available so not require to scan any catalog table for checking the table existence. 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