How to split two words and number between two number? - sql

Question

My table Data looks like
Sno Componet Subcomponent IRNo
1 1 C1 to C100 001
2 1 C101 to C200 002
3 1 C201 to C300 003
4 1 C301,C400 004
5 1 C401,C500 005
If user enter C50 into textbox then it will get the data from First Row.Mean C50 between C1 to C100(C1,C100)
as same as if user enter C340 , then it will the data from SNO 4.
Means C340 between C301,C400(C301 to C400)
How can I write the query for this in sql server?

Answer 1

This is a terrible design and should be replaced with a better one if possible.
If re-designing is not possible then this answer by Eduard Uta is a good one, but still has one drawback compared to my suggested solution:
It assumes that the Subcomponent will always contain exactly one letter and a number, and that the range specified in the table has the same letter in both sides. a range like AB1 to AC100 might be possible (at least I don't think there's a way to prevent it using pure t-sql).
This is the only reason I present my solution as well. Eduard already got my vote up.
DECLARE #Var varchar(50) = 'C50'
-- also try 'AB150' and 'C332'
;WITH CTE AS (
SELECT Sno, Comp, SubComp,
LEFT(FromValue, PATINDEX('%[0-9]%', FromValue)-1) As FromLetter,
CAST(RIGHT(FromValue, LEN(FromValue) - (PATINDEX('%[0-9]%', FromValue)-1)) as int) As FromNumber,
LEFT(ToValue, PATINDEX('%[0-9]%', ToValue)-1) As ToLetter,
CAST(RIGHT(ToValue, LEN(ToValue) - (PATINDEX('%[0-9]%', ToValue)-1)) as int) As ToNumber
FROM
(
SELECT Sno, Comp, SubComp,
LEFT(SubComp,
CASE WHEN CHARINDEX(' to ', SubComp) > 0 THEN
CHARINDEX(' to ', SubComp)-1
WHEN CHARINDEX(',', SubComp) > 0 THEN
CHARINDEX(',', SubComp)-1
END
) FromValue,
RIGHT(SubComp,
CASE WHEN CHARINDEX(' to ', SubComp) > 0 THEN
LEN(SubComp) - (CHARINDEX(' to ', SubComp) + 3)
WHEN CHARINDEX(',', SubComp) > 0 THEN
CHARINDEX(',', SubComp)-1
END
) ToValue
FROM T
) InnerQuery
)
SELECT Sno, Comp, SubComp
FROM CTE
WHERE LEFT(#Var, PATINDEX('%[0-9]%', #Var)-1) BETWEEN FromLetter AND ToLetter
AND CAST(RIGHT(#Var, LEN(#Var) - (PATINDEX('%[0-9]%', #Var)-1)) as int) BETWEEN FromNumber And ToNumber
sqlfiddle here

Answer 2

No comments about the design. One solution for your question is using a CTE to sanitize the range boundaries and get them to a format that you can work with like so:
DECLARE #inputVal varchar(100) = 'C340'
-- sanitize input:
SELECT #inputVal = RIGHT(#inputVal, (LEN(#inputVal)-1))
;WITH cte (Sno,
SubcomponentStart,
SubcomponentEnd,
IRNo
)
AS
(
SELECT
Sno,
CASE WHEN Subcomponent LIKE '%to%'
THEN REPLACE(SUBSTRING(Subcomponent, 2, CHARINDEX('to', Subcomponent)), 'to','')
ELSE REPLACE(SUBSTRING(Subcomponent, 2,CHARINDEX(',', Subcomponent)), ',','')
END as SubcomponentStart,
CASE WHEN Subcomponent LIKE '%to%'
THEN REPLACE(SUBSTRING(Subcomponent, CHARINDEX('to', Subcomponent)+4, LEN(Subcomponent)), 'to', '')
ELSE REPLACE(SUBSTRING(Subcomponent, CHARINDEX(',', Subcomponent)+3, LEN(Subcomponent)), ',', '')
END as SubcomponentEnd,
IRNo
from test
)
SELECT t.*
FROM test t
INNER JOIN cte c
ON t.Sno = c.Sno
WHERE CAST(#inputVal as int) BETWEEN CAST(c.SubcomponentStart as INT) AND CAST(c.SubcomponentEnd as INT)
SQL Fiddle / tested here: http://sqlfiddle.com/#!6/1b9f0/19

Answer 3

For example you're getting UserEntry in variable #UserEntry, entry value is 'C5'.
-- Start From Here --
set #UserEntry = substring(#UserEntry,2,len(#UserEntry)-1)
select * from <tablename> where convert(int,#UserEntry)>=convert(int,SUBSTRING(Subcomponent,2,charindex('to',Subcomponent,1)-2)) and convert(int,#UserEntry)<=convert(int,(SUBSTRING(Subcomponent,charindex('c',Subcomponent,2)+1,len(Subcomponent)-charindex('c',Subcomponent,3))))