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: If the updated data does not exist, it is inserted to the database. > My problem: if the insert fails because the value already exists, then > this starts a rollback of my entire transaction. Please Sign up or sign in to vote. Because, before PostgreSQL 9.1 this was not there and still they perception is the same. Hi, When I'm using the query Previously, we have to use upsert or merge statement to do this kind of operation. PostgreSQL also has INSERT… ON CONFLICT UPDATE grammar from 9.5. Check the sample: If the table exists, you get a message like a table already exists. 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. 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. Regards Phil How will you which records were updated, thus able to know which need to be inserted? Now, TABLE IF NOT EXISTS is available so not require to scan any catalog table for checking the table existence. ... table. The sample code is as follows. I'm trying to achieve database abstraction in my project, but now I got stuck with doing a bulk INSERT in PostgreSQL. The fastest method to load or unload data in PostgreSQL is the copy command. 0.00/5 (No votes) See more: SQL. Here are the statements that will do so. 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 ? 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. 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 Code: DO $$ BEGIN IF EXISTS (SELECT FROM educational_platforms WHERE technology='psql') THEN After a long time of waiting, PostgreSQL 9.5 introduced INSERT ON CONFLICT [DO UPDATE] [DO NOTHING]. My project is in C# and I'm using PostgreSQL 9.3 with npgsql.dll 2.0.14. Re: Conditional INSERT: if not exists at 2006-08-23 18:57:55 from Franck Routier; Responses. This option basically helps to perform DML actions like, Insert IF not Exists, Update IF Exists. If the updated data already exists, it replaces the old version. 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. If record exists then update, else insert new record I have a table that contains a large amount of data which gets updated daily with either new data, or data (rows) that already exist in … And even not changing there old code or script. I’ll use the same file to load the data as in the previous post. How do I use the (NOT) EXISTS or (NOT) IN clause ? The solution I'm. This option instructs PostgreSQL to add the new column only if the column name does not exist in the table. Insert multiple rows with where not exists condition. 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. In this case, you can use a combination of bulk delete and bulk insert. I’ll do a test case on this below. I have also published an article on it. My problem: if the column name does not exist in the previous post now, if... A combination of bulk delete and bulk INSERT method to load the as... 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