[Solved] Using WITH + DELETE clause in a single query in postgresql

How to optimize this SQL query?

In case you have your own slow SQL query, you can optimize it automatically here.

For the query above, the following recommendations will be helpful as part of the SQL tuning process.
You'll find 3 sections below:

  1. Description of the steps you can take to speed up the query.
  2. The optimal indexes for this query, which you can copy and create in your database.
  3. An automatically re-written query you can copy and execute in your database.
The optimization process and recommendations:
  1. Create Optimal Indexes (modified query below): The recommended indexes are an integral part of this optimization effort and should be created before testing the execution duration of the optimized query.
Optimal indexes for this query:
CREATE INDEX listens_idx_uid ON "listens" ("uid");
The optimized query:
WITH max_table AS (SELECT
        max(listens.timestamp) - 10000 AS max 
    FROM
        listens 
    GROUP BY
        listens.uid) SELECT
        1 
    FROM
        listens 
    WHERE
        listens.timestamp < (
            SELECT
                max_table.max 
            FROM
                max_table
        )

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* original question posted on StackOverflow here.