번역 도움말 MS SQL => Oracle

Question

MS SQL 함수를 Oracle로 변환하려고하는데 문제가 생겼습니다. 그들은 점차적으로 기능에 임시 테이블을 만드는 이유입니다. 점차적으로 추가 할 임시 테이블을 커서로 대체 할 수 없습니다. 사람이 어떻게 오라클이 쓰기 좋은 생각을 가지고 있습니다

ALTER FUNCTION [dbo].[F_GetDateIntervalTable] 
(
@OccurredFrom datetime, 
@OccurredTo datetime, 
@Interval decimal 
) 
RETURNS @Tbl table 
(
[Dts] datetime 
) 
AS 
BEGIN 
    DECLARE @Count int 
    --DECLARE @Tbl table([Dts] datetime) 
    DECLARE @Dts datetime 
    DECLARE @SeedDts datetime 

SET @Count = 1 
SET @Dts = DATEADD(MINUTE, FLOOR(DATEDIFF(MINUTE,0,@OccurredFrom)/@Interval)*@Interval, 0); 
SET @SeedDts = DATEADD(MINUTE, FLOOR(DATEDIFF(MINUTE,0,@OccurredFrom)/@Interval)*@Interval, 0); 
SET @OccurredTo = DATEADD(MINUTE, -@Interval, @OccurredTo); 
WHILE (@SeedDts < @OccurredTo) 
BEGIN 
    SET @SeedDts = DATEADD(MINUTE, @Interval*(@Count-1), @Dts) 
    INSERT INTO @Tbl(Dts) VALUES(@SeedDts) 
    SET @Count = (@Count + 1) 
END 

RETURN 

END 

출력이 (매개 변수 지정)해야

:

@OccurredFrom = '2013-01-01', 
@OccurredTo = '2013-01-02', 
@Interval = 60 



2013-01-01 00:00:00.000 
2013-01-01 01:00:00.000 
2013-01-01 02:00:00.000 
2013-01-01 03:00:00.000 
2013-01-01 04:00:00.000 
2013-01-01 05:00:00.000 
2013-01-01 06:00:00.000 
2013-01-01 07:00:00.000 
2013-01-01 08:00:00.000 
2013-01-01 09:00:00.000 
2013-01-01 10:00:00.000 
2013-01-01 11:00:00.000 
2013-01-01 12:00:00.000 
2013-01-01 13:00:00.000 
2013-01-01 14:00:00.000 
2013-01-01 15:00:00.000 
2013-01-01 16:00:00.000 
2013-01-01 17:00:00.000 
2013-01-01 18:00:00.000 
2013-01-01 19:00:00.000 
2013-01-01 20:00:00.000 
2013-01-01 21:00:00.000 
2013-01-01 22:00:00.000 
2013-01-01 23:00:00.000 

어떤 아이디어가 grealty 감사합니다!

Answer 1

당신은 단순히 당신이 파이프 라인 테이블 함수를 만들 수 있습니다

SQL> ed 
Wrote file afiedt.buf 

    1 with x as (
    2 select date '2013-01-01' start_date, 
    3   date '2013-01-02' end_date, 
    4   60 interval 
    5  from dual 
    6 ) 
    7 select start_date + numtodsinterval(interval * (level-1), 'minute') 
    8 from x 
    9* connect by level <= (end_date - start_date)*24*60/interval 
SQL>/

START_DATE+NUMTODSI 
------------------- 
2013-01-01 00:00:00 
2013-01-01 01:00:00 
2013-01-01 02:00:00 
2013-01-01 03:00:00 
2013-01-01 04:00:00 
2013-01-01 05:00:00 
2013-01-01 06:00:00 
2013-01-01 07:00:00 
2013-01-01 08:00:00 
2013-01-01 09:00:00 
2013-01-01 10:00:00 
2013-01-01 11:00:00 
2013-01-01 12:00:00 
2013-01-01 13:00:00 
2013-01-01 14:00:00 
2013-01-01 15:00:00 
2013-01-01 16:00:00 
2013-01-01 17:00:00 
2013-01-01 18:00:00 
2013-01-01 19:00:00 
2013-01-01 20:00:00 
2013-01-01 21:00:00 
2013-01-01 22:00:00 
2013-01-01 23:00:00 

24 rows selected. 

SQL 쿼리를 작성하는 대신 함수를 사용할 필요가 가정

SQL> create type tbl_date as table of date; 
    2/

Type created. 

SQL> create or replace function get_date_interval(p_start_date in date, 
    2            p_end_date in date, 
    3            p_interval in number) 
    4 return tbl_date 
    5 pipelined 
    6 is 
    7 l_return_dt date := p_start_date; 
    8 begin 
    9 while(l_return_dt < p_end_date) 
10 loop 
11  pipe row(l_return_dt); 
12  l_return_dt := l_return_dt + numtodsinterval(p_interval, 'minute'); 
13 end loop; 
14 return; 
15 end; 
16/

Function created. 

SQL> select * 
    2 from table(get_date_interval(date '2013-01-01', 
    3         date '2013-01-02', 
    4         60)); 

COLUMN_VALUE 
------------------- 
2013-01-01 00:00:00 
2013-01-01 01:00:00 
2013-01-01 02:00:00 
2013-01-01 03:00:00 
2013-01-01 04:00:00 
2013-01-01 05:00:00 
2013-01-01 06:00:00 
2013-01-01 07:00:00 
2013-01-01 08:00:00 
2013-01-01 09:00:00 
2013-01-01 10:00:00 
2013-01-01 11:00:00 
2013-01-01 12:00:00 
2013-01-01 13:00:00 
2013-01-01 14:00:00 
2013-01-01 15:00:00 
2013-01-01 16:00:00 
2013-01-01 17:00:00 
2013-01-01 18:00:00 
2013-01-01 19:00:00 
2013-01-01 20:00:00 
2013-01-01 21:00:00 
2013-01-01 22:00:00 
2013-01-01 23:00:00 

24 rows selected.