Split String Into Individual Rows - sql-server

Question

I'm currently tying to figure out how to split an ID into 2 rows at each instance of '/'. The original IDs will still be saved in the main table as well as temp table 2 but I need the new IDs saved to a new table. All of this happens in temporary tables on a pre-import handler before a report is generated.
The tables output is currently as follows:
RWID RWLEN DESCR QTY UNIT
T2/10060 20.0000 SomeInfo 1 pcs
T2/10061 18.5689 SomeInfo 1 pcs
T2/10062 20.0000 SomeInfo 1 pcs
I need the table to out the following:
RWID RWLEN DESCR QTY UNIT
T10060 20.0000 SomeInfo 1 pcs
T20060 20.0000 SomeInfo 1 pcs
T10061 18.5689 SomeInfo 1 pcs
T20061 18.5689 SomeInfo 1 pcs
T10062 20.0000 SomeInfo 1 pcs
T20062 20.0000 SomeInfo 1 pcs
A snippet of my code is below:
-- populate temp table 1 from main table
SELECT *
INTO ##tmp1
FROM main;
-- populate temp table 2 from temp table 1, group and order by RWID
SELECT RWID, MAX(DESCR) as aux
INTO ##tmp2
FROM ##tmp1
group by RWID
ORDER by RWID;
-- populate temp table 3 from temp table 1 then split strings with dividers
SELECT RWID, RWLEN, DESCR, QTY, UNIT
INTO ##tmp3
FROM ##tmp1
UNION ALL
SELECT RWID, NULL RWLEN, NULL DESCR, NULL QTY, NULL UNIT
FROM ##tmp1
GROUP BY RWID
ORDER BY RWID, DESCR desc;
SELECT
RWID = CASE WHEN a.DESCR = b.AUX THEN a.RWID ELSE NULL END,
RWLEN = CASE WHEN a.DESCR = b.AUX THEN a.RWLEN ELSE NULL END,
a.DESCR,
a.QTY,
a.UNIT
INTO ##report
FROM ##tmp3
a
FULL OUTER JOIN ##tmp2
b on a.RWID = b.RWID;
SELECT *
FROM ##report
Thanks in advance for your time and assistance.
UPDATE! Thanks so much for all of your help, it really steered me in the right direction. I've figured out how to split the strings shown above as well as the other types of IDs that I'll encounter that I hadn't included in the example. Thanks again for your time and help, you're all awesome!!
Result: http://www.sqlfiddle.com/#!18/17a09/1

Answer 1

You can simply use a UNION ALL like following to get the desired output.
SELECT 'T1'+ SUBSTRING(RWID,CHARINDEX('/',RWID)+1,
LEN(RWID)- CHARINDEX('/',RWID)) -- + OTHER COLUMN
FROM [TABLE_NAME]
UNION ALL
SELECT 'T2'+ SUBSTRING(RWID,CHARINDEX('/',RWID)+1,
LEN(RWID)- CHARINDEX('/',RWID)) -- + OTHER COLUMN
FROM [TABLE_NAME]
Complete Example
DECLARE #TBL TABLE (RWID VARCHAR(30), RWLEN DECIMAL(15,2),
DESCR VARCHAR(50), QTY INT, UNIT VARCHAR(4))
INSERT INTO #TBL
values
('T2/10060', 20.0000 ,'SomeInfo', 1 ,'pcs'),
('T2/10061', 18.5689 ,'SomeInfo', 1 ,'pcs'),
('T2/10062', 20.0000 ,'SomeInfo', 1 ,'pcs')
SELECT 'T1'+ SUBSTRING(RWID, CHARINDEX('/',RWID)+1,LEN(RWID)- CHARINDEX('/',RWID)) RWID
,RWLEN, DESCR, QTY, UNIT
FROM #TBL
UNION ALL
SELECT 'T2'+ SUBSTRING(RWID, CHARINDEX('/',RWID)+1,LEN(RWID)- CHARINDEX('/',RWID)) RWID
,RWLEN, DESCR, QTY, UNIT
FROM #TBL
Output
+---------+-------+----------+-----+------+
| RWID | RWLEN | DESCR | QTY | UNIT |
+---------+-------+----------+-----+------+
| T110060 | 20.00 | SomeInfo | 1 | pcs |
+---------+-------+----------+-----+------+
| T110061 | 18.57 | SomeInfo | 1 | pcs |
+---------+-------+----------+-----+------+
| T110062 | 20.00 | SomeInfo | 1 | pcs |
+---------+-------+----------+-----+------+
| T210060 | 20.00 | SomeInfo | 1 | pcs |
+---------+-------+----------+-----+------+
| T210061 | 18.57 | SomeInfo | 1 | pcs |
+---------+-------+----------+-----+------+
| T210062 | 20.00 | SomeInfo | 1 | pcs |
+---------+-------+----------+-----+------+
DEMO

Answer 2

SQL-server using CTE
declare #table table (rwid varchar(30), rwlen float, descr varchar(50), qty int, unit varchar(4))
insert into #table
values
('T2/10060', 20.0000 ,'SomeInfo', 1 ,'pcs'),
('T2/10061', 18.5689 ,'SomeInfo', 1 ,'pcs'),
('T2/10062', 20.0000 ,'SomeInfo', 1 ,'pcs')
;with mycte as (
select *, cast(right(left(rwid,charindex('/',rwid)-1),1) as int) [num], 1 [start] from #table
union all
select t.*,c.start + 1, c.num from #table t
inner join mycte c
on c.rwid = t.rwid
and c.start + 1 <= c.num
)
select
concat(left(rwid,1), start,replace(rwid,left(rwid,charindex('/',rwid)+1),'')) ,
rwlen,
descr,
qty,
unit
from mycte
order by rwid, start

Answer 3

Using Cross apply
;WITH CTE( RWID, RWLEN,DESCR,QTY, UNIT)
AS
(
SELECT 'T2/10060',20.0000,'SomeInfo', 1,'pcs' UNION ALL
SELECT 'T2/10061',18.5689,'SomeInfo', 1,'pcs' UNION ALL
SELECT 'T2/10062',20.0000,'SomeInfo', 1,'pcs'
)
SELECT REPLACE(RWID,'2/1',CAST(Rnk AS VARCHAr(2))) AS RWID
,RWLEN
,DESCR
,QTY
,UNIT
FROM
(
SELECT C.*,ROW_NUMBER()OVER(PARTITION BY C.RWID ORDER BY C.RWID) AS Rnk
FROM CTE C
CROSS APPLY CTE C2
)dt WHERE Rnk<3
Result
http://www.sqlfiddle.com/#!18/9eecb/11626