How to query from range? - sql-server

Question

I have a table like this
CREATE TABLE Table1
([range] varchar(9), [sector] int)
;
INSERT INTO Table1
([range], [sector])
VALUES
('684-733', 2),
('563-598', 3),
('514-544', 2),
('640-682', 3),
('1053-1152', 2)
;
I want to get information by passing a predicate
So far I have this
select sector from table1 where [range] = 564
expected outcome
3
Is there any function I can use to get the data?

Answer 1

Please try the following solution.
SQL
-- DDL and sample data population, start
DECLARE #tbl TABLE (ID INT IDENTITY PRIMARY KEY, [range] varchar(9), [sector] int);
INSERT INTO #tbl ([range], [sector]) VALUES
('684-733', 2),
('563-598', 3),
('514-544', 2),
('640-682', 3),
('1053-1152', 2);
-- DDL and sample data population, end
DECLARE #param INT = 564;
;WITH rs AS
(
SELECT *
, LEFT([range], pos -1) AS [start]
, RIGHT([range], LEN([range]) - pos) AS [end]
FROM #tbl
CROSS APPLY (SELECT CHARINDEX('-', [range])) AS t(pos)
)
SELECT sector
FROM rs
WHERE #param BETWEEN [start] AND [end];
Output
+--------+
| sector |
+--------+
| 3 |
+--------+

Answer 2

Storing a number as a string like this could cause many issues later. Your best move is refactoring the table as follows:
CREATE TABLE Table1
([beginrange] int, [endrange] int, [sector] int)
Insert into table1 values
(684, 733, 2)
...
You would then get your result with:
select sector from table1 where 564 between [beginrange] and [endrange]
That said, if you do not have control over this table, you'll need to parse the string into two integers:
select * from table1 where 580 between convert(int, substring([range], 0, charindex('-', [range]))) and convert(int, substring([range], charindex('-', [range]) + 1, len([range])))
You can look up the various functions used here.

Answer 3

in SQL Server 2016 and later you can use string_split :
select sector
from table1 t1
cross apply string_split(t1.range, '-') y
group by sector
having 564 between min(y.value) and max(y.value)
db<>fiddle here

Answer 4

use a cross apply and a case statement to find a range where 564 is between the start and end values
select
tbl1.range,
case when 564 between Lookup.startValue and Lookup.endValue then
tbl1.sector
end Sector
from #tbl tbl1
cross apply
(
select
tbl2.range,
tbl2.sector,
cast(left(tbl2.range,charindex('-',tbl2.range)-1) as int) startValue,
cast(right(tbl2.range,len(tbl2.range)-charindex('-',tbl2.range)) as int) endValue
from #tbl tbl2
where tbl1.range=tbl2.range
)Lookup
where
case when 564 between Lookup.startValue and Lookup.endValue then
tbl1.sector
end is not null
output:
range Sector
563-598 3