[Solved] Order a postgreSQL query on a rolling period

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 event_idx_id ON "event" ("id");
CREATE INDEX event_type_idx_event_id_type_id ON "event_type" ("event_id","type_id");
CREATE INDEX type_idx_type_id ON "type" ("type_id");
The optimized query:
SELECT
        type.name_type AS type_name,
        EXTRACT(day 
    FROM
        event.creation_date) AS days,
        count(0) AS number 
    FROM
        event,
        type,
        event_type 
    WHERE
        event.id = event_type.event_id 
        AND type.type_id = event_type.type_id 
    GROUP BY
        days,
        type_name

Related Articles



* original question posted on StackOverflow here.