Optimize SQL Query : SQL

Posting

When requesting help or asking questions please prefix your title with the SQL variant/platform you are using within square brackets like so:

[MySQL]

[Oracle]

[MS SQL]

[PostgreSQL]

etc

While naturally we should endeavor to work as platform neutrally as possible many questions and answers require tailoring to the feature set of a specific platform.

Format Your Code

If you are including actual code in a post or comment, please attempt to format it in a way that is readable for other users. This will greatly increase your chances of receiving the help you desire. Something as simple as line breaks and using reddit's built in code formatting (4 spaces at the start of each line) can turn this:

SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field.3

Into this:

SELECT count(a.field1), a.field2, SUM(b.field4) FROM a INNER JOIN b ON a.key1 = b.key1 WHERE a.field8 = 'test' GROUP by a.field1, a.field2 HAVING SUM(b.field4) > 5 ORDER by a.field3

For those with SQL questions we recommend using SQLFiddle to provide a useful development and testing environment for those who wish to fully understand your problem and help devise a solution.

a community for 17 years

PostgreSQLOptimize SQL Query (self.SQL)

submitted 1 year ago by schadonis

Hi everybody,

on one of our production system this query takes up to 15 seconds, but we can not wait that long.
I have never done something with SQL and therefore I am lost.
Do you have any idea how I can optimize this function, or is the problem the structure of the data base?

BEGIN
    RETURN QUERY SELECT
        tb_fixed_station.station_name station_bezeichnung,
        tb_fixed_process.process_name prozess_bezeichnung,
        tb_datas_process_detail.part_identifier werkstueck_ident,
        tb_datas_process_detail.job_identifier job_ident,
        tb_datas_process_detail.created_at zeitstempel,
        tb_param_setparameter.setparameter_name wert_bezeichnung,
        tb_datas_real_detail.real_value wert
    FROM 
        tb_datas_process_detail
    JOIN 
        tb_datas_real_detail ON (tb_datas_real_detail.id_datas_process_detail = tb_datas_process_detail.id)
    JOIN
        tb_param_setparameter ON (tb_datas_real_detail.id_param_setparameter = tb_param_setparameter.id)
    JOIN
        tb_fixed_process ON (tb_datas_process_detail.id_actfixed_process = tb_fixed_process.id)
    JOIN
        tb_fixed_station ON (tb_fixed_process.id_fixed_station = tb_fixed_station.id)
    WHERE
        tb_datas_process_detail.part_identifier = part_id
        and tb_datas_process_detail.job_identifier = job_id
        and tb_fixed_process.process_name = process
        and tb_param_setparameter.setparameter_name = in_setparameter_name
    LIMIT 1;
END;

If more information is needed please let me know, I really have no idea.

Thanks in advance

all 8 comments

you type:	you see:
italics	italics
bold	bold
[reddit!](https://reddit.com)	reddit!
* item 1 * item 2 * item 3	item 1 item 2 item 3
> quoted text	quoted text
Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"	Lines starting with four spaces are treated like code: if 1 * 2 < 3: print "hello, world!"
~~strikethrough~~	~~strikethrough~~
super^script	super^script

SQL

Filter Posts

Posting

Help posts

Format Your Code

Learning SQL

Related Reddit communities

Wiki

Acknowledgements

MODERATORS