答案 0 :(得分:1)
select
qtr
,replace(
case when charindex('JAN', Months) > 0 then 'JAN,' else '' end
+ case when charindex('FEB', Months) > 0 then 'FEB,' else '' end
+ case when charindex('MAR', Months) > 0 then 'MAR,' else '' end
+ case when charindex('APR', Months) > 0 then 'APR,' else '' end
+ case when charindex('MAY', Months) > 0 then 'MAY,' else '' end
+ case when charindex('JUN', Months) > 0 then 'JUN,' else '' end
+ case when charindex('JUL', Months) > 0 then 'JUL,' else '' end
+ case when charindex('AUG', Months) > 0 then 'AUG,' else '' end
+ case when charindex('SEP', Months) > 0 then 'SEP,' else '' end
+ case when charindex('OCT', Months) > 0 then 'OCT,' else '' end
+ case when charindex('NOV', Months) > 0 then 'NOV,' else '' end
+ case when charindex('DEC', Months) > 0 then 'DEC,' else '' end
+ case when rtrim(ltrim(Months)) != '' then ',' else '' end
,',,'
,''
) [Months]
from
your_table
;
答案 1 :(得分:1)
如果SQL-Server
。
首先创建临时表,表变量或常规表,以存储每个月的订单。
我刚刚创建了一个常规表。
CREATE TABLE tbl_month
(
Months VARCHAR(3), [order] INT
);
INSERT INTO tbl_month VALUES
('JAN',1),
('FEB',2),
('MAR',3),
('APR',4),
('MAY',5),
('JUN',6),
('JUL',7),
('AUG',8),
('SEP',9),
('OCT',10),
('NOV',11),
('DEC',12);
然后拆分每个逗号分隔值并将其与月份订单的上表变量连接,并将结果集存储到临时值以便于使用。
SELECT t1.*, t2.[order] into #temp_table from
(
SELECT A.qtr, Split.a.value('.', 'VARCHAR(100)') as Months FROM
(
SELECT qtr,
CAST ('<M>' + REPLACE(Months, ',', '</M><M>') + '</M>' AS XML) AS Months
FROM my_table_name
) AS A CROSS APPLY Months.nodes ('/M') AS Split(a))t1
JOIN tbl_month t2
ON t1.Months = t2.Months
ORDER BY t1.qtr;
上面的查询将创建一个临时表,如下所示。
+---------+--------+-------+
| qtr | Months | order |
+---------+--------+-------+
| 2015-Q1 | MAR | 3 |
| 2015-Q1 | JAN | 1 |
| 2015-Q1 | FEB | 2 |
| 2015-Q2 | APR | 4 |
| 2015-Q2 | JUN | 6 |
| 2015-Q2 | MAY | 5 |
| 2015-Q3 | SEP | 9 |
| 2015-Q3 | AUG | 8 |
| 2015-Q3 | JUL | 7 |
| 2015-Q4 | OCT | 10 |
| 2015-Q4 | DEC | 12 |
+---------+--------+-------+
然后按照每个qtr
的月份顺序连接月份。
SELECT qtr,
STUFF
(
(
SELECT ',' + Months
FROM #temp_table AS t2
WHERE t2.qtr = t.qtr
ORDER BY [order]
FOR XML PATH('')
),1,1,'') as Months
FROM #temp AS t
GROUP BY qtr
ORDER BY qtr;
<强>结果强>
+---------+-------------+
| qtr | Months |
+---------+-------------+
| 2015-Q1 | JAN,FEB,MAR |
| 2015-Q2 | APR,MAY,JUN |
| 2015-Q3 | JUL,AUG,SEP |
| 2015-Q4 | OCT,DEC |
+---------+-------------+
答案 2 :(得分:0)
所以我和Andy在一起,你提出的设计肯定有代码味道,你违反了关系数据库中规范化的概念。但作为一种纯粹的编码练习,这就是你如何做到的。 1)创建一个拆分字符串的udf 2)创建一个连接到此udf的查询,并按您创建的新日期对其进行排序。
1)
CREATE FUNCTION dbo.splitstring ( @stringToSplit VARCHAR(MAX) )
RETURNS
@returnList TABLE ([Name] [nvarchar] (500))
AS
BEGIN
DECLARE @name NVARCHAR(255)
DECLARE @pos INT
WHILE CHARINDEX(',', @stringToSplit) > 0
BEGIN
SELECT @pos = CHARINDEX(',', @stringToSplit)
SELECT @name = SUBSTRING(@stringToSplit, 1, @pos-1)
INSERT INTO @returnList
SELECT @name
SELECT @stringToSplit = SUBSTRING(@stringToSplit, @pos+1, LEN(@stringToSplit)-@pos)
END
INSERT INTO @returnList
SELECT @stringToSplit
RETURN
END
2)
Select theDate = convert(date, left(qtr, 4) + '-' + st.name + '-01') from [dbo].[Qtrs] q
cross apply dbo.splitstring (q.months) as st
order by thedate