如何在oracle PL SQL中进行动态支点 [英] How to make dynamic pivot in oracle PL SQL
本文介绍了如何在oracle PL SQL中进行动态支点的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在下面有一个查询:我想在过程中使这个枢轴动态化
I have a query below: And I want to make this pivot dynamic in procedures
SELECT *
FROM ( SELECT tcsd AS Aggregator,
country,
SUM (COUNT) AS total,
COUNT (dest_addr) AS bnum,
time_stamp
FROM t_raw_intl_sms_aggr
GROUP BY tcsd,
COUNT,
country,
time_stamp
ORDER BY tcsd,
COUNT,
country,
time_stamp) PIVOT (SUM (total) AS total,
COUNT (bnum) AS bnum_total
FOR time_stamp
IN (TO_DATE ('20150801', 'yyyymmdd') AS DAY_20150801_TOTAL,
TO_DATE ('20150802', 'yyyymmdd') AS DAY_20150802_TOTAL,
TO_DATE ('20150803', 'yyyymmdd') AS DAY_20150803_TOTAL,
TO_DATE ('20150804', 'yyyymmdd') AS DAY_20150804_TOTAL,
TO_DATE ('20150805', 'yyyymmdd') AS DAY_20150805_TOTAL,
TO_DATE ('20150806', 'yyyymmdd') AS DAY_20150806_TOTAL,
TO_DATE ('20150807', 'yyyymmdd') AS DAY_20150807_TOTAL,
TO_DATE ('20150808', 'yyyymmdd') AS DAY_20150808_TOTAL,
TO_DATE ('20150809', 'yyyymmdd') AS DAY_20150809_TOTAL,
TO_DATE ('20150810', 'yyyymmdd') AS DAY_20150810_TOTAL,
TO_DATE ('20150811', 'yyyymmdd') AS DAY_20150811_TOTAL,
TO_DATE ('20150812', 'yyyymmdd') AS DAY_20150812_TOTAL,
TO_DATE ('20150813', 'yyyymmdd') AS DAY_20150813_TOTAL,
TO_DATE ('20150814', 'yyyymmdd') AS DAY_20150814_TOTAL,
TO_DATE ('20150815', 'yyyymmdd') AS DAY_20150815_TOTAL,
TO_DATE ('20150816', 'yyyymmdd') AS DAY_20150816_TOTAL,
TO_DATE ('20150817', 'yyyymmdd') AS DAY_20150817_TOTAL,
TO_DATE ('20150818', 'yyyymmdd') AS DAY_20150818_TOTAL,
TO_DATE ('20150819', 'yyyymmdd') AS DAY_20150819_TOTAL,
TO_DATE ('20150820', 'yyyymmdd') AS DAY_20150820_TOTAL,
TO_DATE ('20150821', 'yyyymmdd') AS DAY_20150821_TOTAL,
TO_DATE ('20150822', 'yyyymmdd') AS DAY_20150822_TOTAL,
TO_DATE ('20150823', 'yyyymmdd') AS DAY_20150823_TOTAL,
TO_DATE ('20150824', 'yyyymmdd') AS DAY_20150824_TOTAL,
TO_DATE ('20150825', 'yyyymmdd') AS DAY_20150825_TOTAL,
TO_DATE ('20150826', 'yyyymmdd') AS DAY_20150826_TOTAL,
TO_DATE ('20150827', 'yyyymmdd') AS DAY_20150827_TOTAL,
TO_DATE ('20150828', 'yyyymmdd') AS DAY_20150828_TOTAL,
TO_DATE ('20150829', 'yyyymmdd') AS DAY_20150829_TOTAL,
TO_DATE ('20150830', 'yyyymmdd') AS DAY_20150830_TOTAL,
TO_DATE ('20150831', 'yyyymmdd') AS DAY_20150831_TOTAL))
ORDER BY aggregator, country
上面的结果是:
SYBASE Papua New Guinea 1 1 2 1 1 1 1
SYBASE Peru 2 13 9 20 43 36 12 19 27 18 23 73 33 41 18 17 12 31 35 41 15 40 23 34 24 31 63 31 20
SYBASE Poland 2 3 8 8 2 10 23 10 17 13 21 21 26 6 11 13 17 14 18 11 7 7 10 4
SYBASE Portugal (includes Azores) 8 7 15 13 14 59 47 40 32 39 50 78 41 47 26 42 68 56 64 51 41 62 90 74 62 40 44 46 55
我已经制作了示例存储过程:
I already made sample stored procedure:
CREATE OR REPLACE PROCEDURE intl_sms_aggr (p_cursor IN OUT SYS_REFCURSOR)
AS
l_query LONG := 'SELECT * FROM ( SELECT tcsd AS Aggregator,
country,
SUM (COUNT) AS total,
COUNT (dest_addr) AS bnum,
time_stamp
FROM t_raw_intl_sms_aggr
GROUP BY tcsd,
COUNT,
country,
time_stamp
ORDER BY tcsd,
COUNT,
country,
time_stamp) PIVOT (SUM (total) AS total,
COUNT (bnum) AS bnum_total
FOR time_stamp
IN (';
BEGIN
FOR x IN (select time_stamp from prev_month)
LOOP
l_query := l_query|| REPLACE (' TO_DATE(''$X$'',''yyyymmdd'') as DAY_$X$_TOTAL, ','$X$',x.time_stamp);
END LOOP;
l_query := l_query || ')) ORDER BY aggregator, country';
-- OPEN p_cursor FOR l_query;
DBMS_OUTPUT.put_line ('query: ' || l_query);
END;
/
但是我在最后一个循环中有一个问题，那就是逗号，请帮我重建我的脚本，这是我的问题:
But I have a problem in my last loop which is the comma, please help me to reconstruct my script, here is my problem:
SELECT *
FROM ( SELECT tcsd AS Aggregator,
country,
SUM (COUNT) AS total,
COUNT (dest_addr) AS bnum,
time_stamp
FROM t_raw_intl_sms_aggr
GROUP BY tcsd,
COUNT,
country,
time_stamp
ORDER BY tcsd,
COUNT,
country,
time_stamp) PIVOT (SUM (total) AS total,
COUNT (bnum) AS bnum_total
FOR time_stamp
IN (TO_DATE ('20150801', 'yyyymmdd') AS DAY_20150801_TOTAL,
TO_DATE ('20150802', 'yyyymmdd') AS DAY_20150802_TOTAL,
TO_DATE ('20150803', 'yyyymmdd') AS DAY_20150803_TOTAL,
TO_DATE ('20150804', 'yyyymmdd') AS DAY_20150804_TOTAL,
TO_DATE ('20150805', 'yyyymmdd') AS DAY_20150805_TOTAL,
TO_DATE ('20150806', 'yyyymmdd') AS DAY_20150806_TOTAL,
TO_DATE ('20150807', 'yyyymmdd') AS DAY_20150807_TOTAL,
TO_DATE ('20150808', 'yyyymmdd') AS DAY_20150808_TOTAL,
TO_DATE ('20150809', 'yyyymmdd') AS DAY_20150809_TOTAL,
TO_DATE ('20150810', 'yyyymmdd') AS DAY_20150810_TOTAL,
TO_DATE ('20150811', 'yyyymmdd') AS DAY_20150811_TOTAL,
TO_DATE ('20150812', 'yyyymmdd') AS DAY_20150812_TOTAL,
TO_DATE ('20150813', 'yyyymmdd') AS DAY_20150813_TOTAL,
TO_DATE ('20150814', 'yyyymmdd') AS DAY_20150814_TOTAL,
TO_DATE ('20150815', 'yyyymmdd') AS DAY_20150815_TOTAL,
TO_DATE ('20150816', 'yyyymmdd') AS DAY_20150816_TOTAL,
TO_DATE ('20150817', 'yyyymmdd') AS DAY_20150817_TOTAL,
TO_DATE ('20150818', 'yyyymmdd') AS DAY_20150818_TOTAL,
TO_DATE ('20150819', 'yyyymmdd') AS DAY_20150819_TOTAL,
TO_DATE ('20150820', 'yyyymmdd') AS DAY_20150820_TOTAL,
TO_DATE ('20150821', 'yyyymmdd') AS DAY_20150821_TOTAL,
TO_DATE ('20150822', 'yyyymmdd') AS DAY_20150822_TOTAL,
TO_DATE ('20150823', 'yyyymmdd') AS DAY_20150823_TOTAL,
TO_DATE ('20150824', 'yyyymmdd') AS DAY_20150824_TOTAL,
TO_DATE ('20150825', 'yyyymmdd') AS DAY_20150825_TOTAL,
TO_DATE ('20150826', 'yyyymmdd') AS DAY_20150826_TOTAL,
TO_DATE ('20150827', 'yyyymmdd') AS DAY_20150827_TOTAL,
TO_DATE ('20150828', 'yyyymmdd') AS DAY_20150828_TOTAL,
TO_DATE ('20150829', 'yyyymmdd') AS DAY_20150829_TOTAL,
TO_DATE ('20150830', 'yyyymmdd') AS DAY_20150830_TOTAL,
TO_DATE ('20150831', 'yyyymmdd') AS DAY_20150831_TOTAL,))
ORDER BY aggregator, country
推荐答案
像下面那样改变你的程序
Change your proc like below
BEGIN
-- Use another variable and initialize with count(*) from prev_month (say totalCount)
-- Initialize another counter say curCount = 0
--
FOR x IN (select time_stamp from prev_month)
LOOP
-- increment curCount. If curCount = totalCount
-- then use
-- l_query := l_query|| REPLACE (' TO_DATE(''$X$'',''yyyymmdd'') as DAY_$X$_TOTAL ','$X$',x.time_stamp); --your code without comma at the end.
-- else
l_query := l_query|| REPLACE (' TO_DATE(''$X$'',''yyyymmdd'') as DAY_$X$_TOTAL, ','$X$',x.time_stamp);
-- end if.
END LOOP;
确切的语法
BEGIN
curCount := 0;
SELECT COUNT (*) INTO o_count FROM prev_month;
FOR x IN (select time_stamp from prev_month)
LOOP
curCount := curCount +1; -- increment curCount.
IF curCount = o_count THEN
l_query :=l_query|| REPLACE (' TO_DATE(''$X$'',''yyyymmdd'') as DAY_$X$_TOTAL ','$X$',x.time_stamp);
else
l_query := l_query|| REPLACE (' TO_DATE(''$X$'',''yyyymmdd'') as DAY_$X$_TOTAL, ','$X$',x.time_stamp);
end if.
END LOOP;
这篇关于如何在oracle PL SQL中进行动态支点的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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