Extract & Expand Numbers - sql

Question

Using SQL with Microsoft SQL Server. I have a column that has values like this:
5-7(A-C) 15(A-C)
3(A-C)
I am trying to extract the numbers and if there is a dash then I need those numbers plus all the numbers in between. So for this example the output would be 5, 6, 7, 15 for the first row and 3 for the second row. I will use the results to see if they exist in another table.
I have been using this but it does not get the numbers between the dash:
SELECT
CASE
WHEN CHARINDEX('-', SUBSTRING(cc_EXPRESSION, 1, CHARINDEX('(', cc_EXPRESSION) - 1)) > 0
THEN CAST(LEFT(SUBSTRING(cc_EXPRESSION, 1, CHARINDEX('(', cc_EXPRESSION) - 1), CHARINDEX('-', SUBSTRING(cc_EXPRESSION, 1, CHARINDEX('(', cc_EXPRESSION) - 1)) - 1) AS INT)
ELSE CAST(SUBSTRING(cc_EXPRESSION, 1, CHARINDEX('(', cc_EXPRESSION) - 1) AS INT)
END AS extracted_number

Answer 1

Here is an option that illustrates how you can "stack" expressions via a CROSS APPLY and JOIN an ad-hoc tally/numbers table.
You may notice I used TOP 1000 ... feel free to pick a more reasonable number
Example
Select A.cc_Expression
,NewValue = string_agg(N+R1,',')
From YourTable A
Cross Apply string_split(cc_Expression,' ') B
Cross Apply (values ( replace(left(B.Value,charindex('(',B.Value)-1 ),'-','.') ) )C(Rng)
Cross Apply (values (try_convert(int,coalesce(parsename(C.Rng,2),parsename(C.Rng,1) )) ,try_convert(int,parsename(C.Rng,1) )) ) D(R1,R2)
Join ( Select Top 1000 N=-1+Row_Number() Over (Order By (Select NULL)) From master..spt_values n1, master..spt_values n2 ) E on N<=R2-R1
Group By A.cc_Expression
Results
cc_Expression NewValue
3(A-C) 3
5-7(A-C) 15(A-C) 5,6,7,15

Answer 2

With the following table :
CREATE TABLE I_have_a_column_that_has_values_like_this (COL VARCHAR(256));
INSERT INTO I_have_a_column_that_has_values_like_this
VALUES ('5-7(A-C) 15(A-C)'), ('3(A-C)');
You can do it like :
WITH
T0 AS
(
SELECT COL, LEFT(value, CHARINDEX('(', value) -1) AS VAL
FROM I_have_a_column_that_has_values_like_this
CROSS APPLY STRING_SPLIT(COL, ' ')
),
T1 AS
(
SELECT COL, CASE WHEN VAL NOT LIKE '%-%' THEN VAL + '-' + VAL ELSE VAL END AS VAL
FROM T0
)
SELECT COL, value AS VALS
FROM T1
CROSS APPLY GENERATE_SERIES(CAST(LEFT(VAL, CHARINDEX('-', VAL)-1) AS INT),
CAST(RIGHT(VAL, CHARINDEX('-', REVERSE(VAL))-1) AS INT)) AS G
The result will be :
COL VALS
---------------------- -----------
5-7(A-C) 15(A-C) 5
5-7(A-C) 15(A-C) 6
5-7(A-C) 15(A-C) 7
5-7(A-C) 15(A-C) 15
3(A-C) 3