Преобразование запросов MS Access в запросы PostgreSQL (format ())

Question

У меня есть запрос из MS Access SQL, который я хотел бы выполнить в PostgreSQL:

SELECT Format("start_date", 'mmmm') AS "Month", 
   DFS_FIRE_ARCHIVE.FIRE_YEAR AS "Year", 
   Count(DFS_FIRE_ARCHIVE.FIRE_ZONE) AS "Number of Fires", 
   OBJECTIVES_NFD."response_category"

FROM (DFS_FIRE_ARCHIVE 

INNER JOIN OBJECTIVE_ORDER ON DFS_FIRE_ARCHIVE.OBJECTIVE = OBJECTIVE_ORDER.OBJECTIVE) 
INNER JOIN OBJECTIVES_NFD ON OBJECTIVE_ORDER.OBJECTIVE = OBJECTIVES_NFD.OBJECTIVE

GROUP BY Format("start_date",'mmmm'), 
     DFS_FIRE_ARCHIVE.FIRE_YEAR, 
     DFS_FIRE_ARCHIVE.OBJECTIVE, 
     Format("start_date",'mm'), 
     OBJECTIVE_ORDER.ORDER, 
     DFS_FIRE_ARCHIVE.FIRE_MGT_ZONE, 
     DFS_FIRE_ARCHIVE.FIRE_TYPE, 
     OBJECTIVES_NFD."response_category"

HAVING (((DFS_FIRE_ARCHIVE.FIRE_YEAR)=2009) AND ((DFS_FIRE_ARCHIVE.FIRE_MGT_ZONE)='INT') AND ((DFS_FIRE_ARCHIVE.FIRE_TYPE)='IFR'))

ORDER BY Format("start_date",'mm'), OBJECTIVE_ORDER.ORDER, DFS_FIRE_ARCHIVE.OBJECTIVE;

The error I am receiving is:

    ERROR:  function format(timestamp without time zone, unknown) does not exist
LINE 1: SELECT Format("start_date", 'mmmm') AS "Month", 
               ^
HINT:  No function matches the given name and argument types. You might need to add explicit type casts.

Буду признателен за любую помощь, спасибо.

Answer 1

Функция, которую вы должны заменить Format, вероятно, to_char, например, to_char(timestamp, 'MM').

Взгляните на документацию PostgreSQL: http://www.postgresql.org/docs/9.0/static/functions-formatting.html

Answer 2

Вы ищете to_char ():

http://www.postgresql.org/docs/current/static/functions-formatting.html