Databases
StackOverflow2013
Postsdbo
POHow to return multiple rows in PostgreSQL using RECORD?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to return multiple rows in PostgreSQL using RECORD?
    primarykey
    data
    text
    <p>I'm trying to create a function which runs an SQL query on multiple tables and outputs the resulting table from the query. The resulting table will have multiple rows. I'm having a lot of difficulty with this and I've read posts which suggest using <code>RETURN NEXT</code> but I haven't been able to get that to work either. From what I understand <code>RECORD</code> can be used because it takes the values of the data fed into it. Here is my code so far:</p> <pre><code>CREATE OR REPLACE FUNCTION most_docs() RETURNS SETOF RECORD AS $$ DECLARE result RECORD; BEGIN CREATE VIEW MOSTDOC AS SELECT P.country, COUNT(P.country) AS cnt FROM Producer P, Movie M, ProducerMovie PM WHERE M.title = PM.title AND M.year = PM.year AND P.name = PM.name AND M.genre = 'Documentary' GROUP BY P.country; SELECT DISTINCT M.country INTO result FROM MOSTDOC M WHERE M.cnt = (SELECT MAX(M.cnt) FROM MOSTDOC M); RETURN result; END; $$ LANGUAGE plpgsql; </code></pre> <p>Any help would be much appreciated. Thanks.</p> <p>---------- Word in Progress code</p> <pre><code>CREATE OR REPLACE FUNCTION most_docs() RETURNS SETOF RECORD AS $$ DECLARE result RECORD BEGIN CREATE VIEW MOSTDOC AS SELECT P.country, COUNT(P.country) AS cnt FROM Producer P, Movie M, ProducerMovie PM WHERE M.title = PM.title AND M.year = PM.year AND P.name = PM.name AND M.genre = 'Documentary' GROUP BY P.country; RETURN QUERY SELECT DISTINCT M.country FROM MOSTDOC M WHERE M.cnt = (SELECT MAX(M.cnt) FROM MOSTDOC M); END; $$ LANGUAGE plpgsql; </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USmu is too short
    1. UStvguide1234
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to return multiple rows in PostgreSQL using RECORD?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to return multiple rows in PostgreSQL using RECORD?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow to return multiple rows in PostgreSQL using RECORD?
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload