how to get nulls when number incremented - sql-server

Question

i have a piece of code looks like this
declare #t table (record int,string varchar(MAX))
insert into #t (record,string)values (1,'ABC')
insert into #t (record,string)values (2,'DEF/123')
insert into #t (record,string)values (3,'GHI/456/XYZ')
i got a query where i can result like this
SELECT record,
RIGHT(LEFT(T.string,Number-1),CHARINDEX('/',REVERSE(LEFT('/' + T.string,number-1))))
FROM
master..spt_values,
#t T
WHERE
Type = 'P' AND Number BETWEEN 1 AND LEN(T.string)+1
AND
(SUBSTRING(T.string,Number,1) = '/' OR SUBSTRING(T.string,Number,1) = '')
getting output
record values
1 ABC
2 DEF
2 123
3 GHI
3 456
3 XYZ
how can i get output like this
record values
1 ABC
1 NULL
1 NULL
2 DEF
2 123
2 NULL
3 GHI
3 456
3 XYZ
it has been asked by some user .i excelled upto here and from there how can i achieve desire output

Answer 1

The idea is to generate a rows of record cross joined to 1,2,3 to produce combination of record with another column numbered 1,2,3, then use that combination to join to your splitted values. You must add a ROW_NUMBER for your splitted values first to be able to join it with the generated combinations.
;WITH CteThree(record, N) AS(
SELECT
t.record,
x.N
FROM (
SELECT DISTINCT record FROM #t
)t
CROSS JOIN(
SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3
)x(N)
),
CteSplitted AS(
SELECT
record,
ROW_NUMBER() OVER(PARTITION BY record ORDER BY Number) AS N,
RIGHT(LEFT(T.string,Number-1),CHARINDEX('/',REVERSE(LEFT('/' + T.string,number-1)))) AS str
FROM master..spt_values v
CROSS JOIN #t T
WHERE
Type = 'P'
AND Number BETWEEN 1 AND LEN(T.string)+1
AND (SUBSTRING(T.string,Number,1) = '/' OR SUBSTRING(T.string,Number,1) = '')
)
SELECT
t.record,
s.str
FROM CteThree t
LEFT JOIN CteSplitted s
ON s.record = t.record
AND s.N = t.N

Answer 2

how about this:
declare #t table (record int,string varchar(MAX));
declare #s char(1) = '/';
WITH counter as (
SELECT MAX(LEN(string)-LEN(REPLACE(string, #s, ''))) lines
) ,
splitter as (
SELECT record, string
, line = 1
, pos = h.pos
, value = CASE WHEN h.pos>0 THEN SUBSTRING(string,1,h.pos) ELSE string END
FROM #t
CROSS APPLY (SELECT CHARINDEX(#s, string) pos ) h
UNION ALL
SELECT record, string
, line = s.line + 1
, pos = CASE WHEN s.pos = 0 THEN 0 ELSE h.pos END
, value = CASE WHEN s.pos = 0 THEN null
WHEN h.pos > 0 THEN SUBSTRING(string,s.pos+1,h.pos-s.pos-1)
ELSE SUBSTRING(string,s.pos+1,99)
END
FROM splitter s
CROSS APPLY (SELECT CHARINDEX(#s, string, s.pos+1) pos ) h
WHERE s.line<=(SELECT lines FROM counter)
)
SELECT *
FROM splitter
ORDER BY record,line

Answer 3

try this
DECLARE #t TABLE
(
record INT ,
string VARCHAR(MAX)
)
INSERT INTO #t
( record, string )
VALUES ( 1, 'ABC' ),
( 2, 'DEF/123' ),
( 3, 'GHI/456/XYZ' );
WITH cte
AS ( SELECT Number = 1
UNION ALL
SELECT Number + 1
FROM cte
WHERE Number <= 100
),
NotNull
AS ( SELECT record ,
RIGHT(LEFT(T.string, Number - 1),
CHARINDEX('/',
REVERSE(LEFT('/' + T.string,
number - 1)))) string ,
ROW_NUMBER() OVER ( PARTITION BY T.record ORDER BY T.record ) AS RN
FROM cte
JOIN #t T ON Number <= ( LEN(T.string) + 1 )
AND SUBSTRING(T.string + '/', Number, 1) = '/'
)
SELECT template.record ,
NotNull.string
FROM ( SELECT *
FROM ( SELECT DISTINCT
RN
FROM NotNull
) AS A
CROSS JOIN ( SELECT Record
FROM NotNull
) AS B
) AS template
LEFT JOIN NotNull ON template.RN = NotNull.RN
AND template.Record = NotNull.Record

Answer 4

try this
declare #t table (record int,string varchar(MAX))
insert into #t (record,string)values (1,'ABC')
insert into #t (record,string)values (2,'DEF/123')
insert into #t (record,string)values (3,'GHI/456/XYZ')
declare #mx int
select #mx= len(string)-len(replace(string,'/','')) from #t
select record,t.c.value('.','varchar(max)') as col2 from
(select record,x=cast('<t>'+replace(left(string+'////////////////////',(len(string)+(#mx-(len(string)-len(replace(string,'/','')))))),'/','</t><t>') +'</t>' as xml) from #t)
a cross apply x.nodes('/t') t(c)