Как выполнить запрос на выборку в блоке DO?
Я хочу перенести приведенный ниже код SQL с MS SQL-Server на PostgreSQL.
DECLARE @iStartYear integer
DECLARE @iStartMonth integer
DECLARE @iEndYear integer
DECLARE @iEndMonth integer
SET @iStartYear = 2012
SET @iStartMonth = 4
SET @iEndYear = 2016
SET @iEndMonth = 1
;WITH CTE
AS
(
SELECT
--@iStartYear AS TheStartYear
@iStartMonth AS TheRunningMonth
,@iStartYear AS TheYear
,@iStartMonth AS TheMonth
UNION ALL
SELECT
--CTE.TheStartYear AS TheStartYear
--@iStartYear AS TheStartYear
CTE.TheRunningMonth + 1 AS TheRunningMonth
--,CTE.TheStartYear + (CTE.TheRunningMonth / 12) AS TheYear
,@iStartYear + (CTE.TheRunningMonth / 12) AS TheYear
,(CTE.TheMonth + 1 -1) % 12 + 1 AS TheMonth
FROM CTE
WHERE (1=1)
AND
(
CASE
--WHEN (CTE.TheStartYear + (CTE.TheRunningMonth / 12) ) < @iEndYear
WHEN (@iStartYear + (CTE.TheRunningMonth / 12) ) < @iEndYear
THEN 1
--WHEN (CTE.TheStartYear + (CTE.TheRunningMonth / 12) ) = @iEndYear
WHEN (@iStartYear + (CTE.TheRunningMonth / 12) ) = @iEndYear
THEN
CASE
WHEN ( (CTE.TheMonth + 1 -1) % 12 + 1 )