Convertir Oracle SQL Select en PostgreSQL select

Aquí está su consulta reescrita usando la sintaxis ANSI-92 JOIN:

  SELECT a.abx_apo_number,
         COUNT(ap1.process_mode) AS NUM_PLANNING,
         COUNT(ap2.process_mode) AS NUM_SETUP,
         COUNT(ap3.process_mode) AS NUM_OUTPUT
     FROM ABX a
LEFT JOIN USER_INSTANCE u ON u.abx_apo_number = a.abx_apo_number
LEFT JOIN ACTIVE_PROCESS ap1 ON ap1.process_instance_number = u.instance_number
                            AND ap1.process_mode = 'PLANNING'
LEFT JOIN ACTIVE_PROCESS ap2 ON ap2.process_instance_number = u.instance_number
                            AND ap2.process_mode = 'SETUP'
LEFT JOIN ACTIVE_PROCESS ap3 ON ap3.process_instance_number = u.instance_number
                            AND ap3.process_mode = 'OUTPUT'
 GROUP BY a.abx_apo_number

El (+) es la sintaxis LEFT OUTER JOIN específica de Oracle. Para eliminarlo, sería necesario que cada USER_INSTANCE.instance_number tendría que tener valores para los tres modos de proceso:PLANIFICACIÓN, CONFIGURACIÓN y SALIDA:omita uno y abx_apo_number no se mostrará en la salida.