Eenvoudige 'draaitabel' van Postgres

U kunt CASE . gebruiken in je selecteer clausule.

SELECT  name,
        SUM(CASE WHEN type = 'red' THEN "count" ELSE 0 END) numred,
        SUM(CASE WHEN type = 'blue' THEN "count" ELSE 0 END) numblue
FROM tableName
GROUP BY name

SQLFiddle-demo