Get Numbers Range from Table in MSSQL - sql-server

Question

I have a table in MSSQL 2008R2:
ID | PinAddress
-------------------------------------
1 | 1
1 | 2
1 | 3
1 | 4
1 | 5
1 | 6
1 | 16
1 | 31
2 | 55
2 | 56
2 | 57
2 | 81
2 | 82
2 | 83
2 | 84
3 | 101
3 | 102
3 | 103
3 | 107
3 | 108
3 | 109
What I want is when I search for ID = 1,I want result like
1-6,16,31
When I search for ID = 2,I want result like
55-57,81-84
When I search for ID = 3,I want result like
101-103,107-109
You can use below script to create table and data:
CREATE TABLE PinAddress(ID INT,PinAddress INT)
INSERT INTO PinAddress values(1,1)
INSERT INTO PinAddress values(1,2)
INSERT INTO PinAddress values(1,3)
INSERT INTO PinAddress values(1,4)
INSERT INTO PinAddress values(1,5)
INSERT INTO PinAddress values(1,6)
INSERT INTO PinAddress values(1,16)
INSERT INTO PinAddress values(1,31)
INSERT INTO PinAddress values(2,55)
INSERT INTO PinAddress values(2,56)
INSERT INTO PinAddress values(2,57)
INSERT INTO PinAddress values(2,81)
INSERT INTO PinAddress values(2,82)
INSERT INTO PinAddress values(2,83)
INSERT INTO PinAddress values(2,84)
INSERT INTO PinAddress values(3,101)
INSERT INTO PinAddress values(3,102)
INSERT INTO PinAddress values(3,103)
INSERT INTO PinAddress values(3,107)
INSERT INTO PinAddress values(3,108)
INSERT INTO PinAddress values(3,109)
Thanks

Answer 1

This is a gaps and islands problem, and the key is identifying your continuous ranges, which is done using ROW_NUMBER(). So for ID 3, you have:
ID PinAddress RowNumber
---------------------------
3 101 1
3 102 2
3 103 3
3 107 4
3 108 5
3 109 6
And deducting the row number from the pin address will give you a constant value for each continuous range:
ID PinAddress RowNumber (PinAddress - RowNumber)
---------------------------------------------------
3 101 1 100
3 102 2 100
3 103 3 100
---------------------------------------------------
3 107 4 103
3 108 5 103
3 109 6 103
The query thus far is simply:
SELECT ID,
PinAddress,
GroupingSet = PinAddress - ROW_NUMBER() OVER(PARTITION BY ID ORDER BY PinAddress)
FROM dbo.PinAddress;
Then you can group by your constant value and ID, and use MIN and MAX to get the start and end of each range:
WITH RankedData AS
( SELECT ID,
PinAddress,
GroupingSet = PinAddress - ROW_NUMBER() OVER(PARTITION BY ID ORDER BY PinAddress)
FROM PinAddress
)
SELECT ID,
RangeStart = MIN(PinAddress),
RangeEnd = MAX(PinAddress),
RangeText = CONVERT(VARCHAR(10), MIN(PinAddress)) +
CASE WHEN MIN(PinAddress) = MAX(PinAddress) THEN ''
ELSE ' - ' + CONVERT(VARCHAR(10), MAX(PinAddress))
END
FROM RankedData
GROUP BY ID, GroupingSet;
Which, for ID 3 gives:
ID RangeStart RangeEnd RangeText
-----------------------------------------
3 101 103 101 - 103
3 107 109 107 - 109
Finally, you need to concatenate the RangeText values into a single row, which can be done using SQL Server's XML Extensions.
WITH RankedData AS
( SELECT ID,
PinAddress,
GroupingSet = PinAddress - ROW_NUMBER() OVER(PARTITION BY ID ORDER BY PinAddress)
FROM PinAddress
)
SELECT p.ID,
Ranges = STUFF((SELECT ', ' + CONVERT(VARCHAR(10), MIN(PinAddress)) +
CASE WHEN MIN(PinAddress) = MAX(PinAddress) THEN ''
ELSE ' - ' + CONVERT(VARCHAR(10), MAX(PinAddress))
END
FROM RankedData AS rd
WHERE rd.ID = p.ID
GROUP BY ID, GroupingSet
FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'), 1, 2, '')
FROM (SELECT DISTINCT ID FROM PinAddress) AS p;
Which gives:
ID Ranges
------------------------------
1 1 - 6, 16 - 16, 31 - 31
2 55 - 57, 81 - 84
3 101 - 103, 107 - 109

Answer 2

Try this code
DECLARE #values VARCHAR(8000)
DECLARE #prevseq int
SET #values = ''
SELECT #values = #values +
(CASE WHEN #values = '' OR #values like '%,' THEN cast(PinAddress as varchar) --first value or new after sequence
WHEN PinAddress - 1 = #prevseq THEN ''
ELSE '-' + cast (#prevseq as varchar) + ',' + cast(PinAddress as varchar)
END),
#prevseq = coalesce(PinAddress, -1)
FROM PinAddress
WHERE ID = 1
ORDER BY PinAddress ASC
SELECT #values = #values +
(CASE WHEN #values not like '%' + cast(#prevseq as varchar) THEN '-' + cast(#prevseq as varchar) ELSE '' END)
PRINT #values

Answer 3

#GarethD your logic with ROW_NUMBER was excellent and works like a charm.
I took help of your query and changed it little bit to get my desired output:
WITH RankedData AS
(
SELECT ID,
PinAddress,
GroupingSet = PinAddress - ROW_NUMBER() OVER(PARTITION BY ID ORDER BY PinAddress)
FROM dbo.PinAddress
WHERE ID = 1
)
SELECT p.ID,
Ranges = STUFF(
(
SELECT CASE WHEN MIN(pinaddress) = MAX(PINADDRESS) THEN
', ' + CONVERT(VARCHAR(10), MIN(PinAddress))
ELSE
', ' + CONVERT(VARCHAR(10), MIN(PinAddress)) + '-' +
CONVERT(VARCHAR(10), MAX(PinAddress))
END
FROM RankedData AS rd
WHERE rd.ID = p.ID
GROUP BY
ID,
GroupingSet
FOR XML PATH(''),
TYPE
).value('.', 'VARCHAR(MAX)'),
1,
2,
''
)
FROM (
SELECT DISTINCT ID
FROM RankedData
) AS p;

Answer 4

Basic Version, If you want to fetch the result set for all ID's then create a scalar function.
declare #id int = 1
declare #formed varchar(max)
Select #Formed = ISNULL(#formed+',','')+Formed
from
(
Select
Formed = convert(varchar,MIN([PinAddress]))
+case when MIN([PinAddress]) != MAX([PinAddress]) then '-'
+convert(varchar,MAX([PinAddress] )) else '' end
from PinAddress where ID = #id
group by [PinAddress]/case when [#PinAddress]/10= 0 then 10 else 5 end)t
select #formed