[Solved] POSTGRES aggregate data from joined table

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 agency_socworker_idx_surname ON "agency_socworker" ("surname");
CREATE INDEX agency_base_idx_socworker_id ON "agency_socworker_base_edu" ("socworker_id");
CREATE INDEX agency_honourtype_idx_id ON "agency_socworker_honourtype" ("id");
CREATE INDEX agency_socworkerho_idx_socworker_id ON "agency_socworkerhonours" ("socworker_id");
The optimized query:
SELECT
        asw.surname,
        asw.firstname,
        asw.fathername,
        asw.birthday,
        asbe.institue_title,
        asht.honour_type 
    FROM
        agency_socworker AS asw 
    LEFT JOIN
        agency_socworkerhonours AS ash 
            ON asw.id = ash.socworker_id 
    LEFT JOIN
        agency_socworker_honourtype AS asht 
            ON ash.honour_name_id = asht.id 
    LEFT JOIN
        agency_socworker_base_edu AS asbe 
            ON asbe.socworker_id = asw.id 
    ORDER BY
        asw.surname ASC

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* original question posted on StackOverflow here.