SQL - Split Concatenated String into Columns after ; - sql

Question

I really need help with SQL. I have a database where you can find values like: abc;defg;hi and this is in just 1 column. So I wanna create 2 more colums which inserts the splited values.
For example:
Before:
Value01: abc;defg;hi
After:
Value01: abc,
Value02: defg,
Value03: hi
--Another Example would be this:--
Before:
Value01: abcd;efg;
After:
Value01: abcd,
Value02: efg,
Value03: null
So always 3 new values were created. I hope you understand my question!
Greetings

Answer 1

You can use string_split():
select nullif(s.value, '')
from string_split(#value, ';') s

Answer 2

Use WITH
WITH CTE
AS
(
SELECT [xml_val] = CAST('<t>' + REPLACE(SomeValue,';','</t><t>') + '</t>' AS XML)
FROM #yourTable
)
SELECT [SomeValue] = col.value('.','VARCHAR(100)')
FROM CTE
CROSS APPLY [xml_val].nodes('/t') CA(col)

Answer 3

Here is a solution that should be fairly performant:
--==== Sample Data
Declare #testData Table (Value01 varchar(255));
Insert Into #testData (Value01)
Values ('abc;defg;hi'), ('abcd;efg;');
--==== Solution using sample data from above
Select *
, Value01 = substring(td.Value01, 1, p1.pos - 2)
, Value02 = substring(td.Value01, p1.pos, p2.pos - p1.pos - 1)
, Value03 = substring(td.Value01, p2.pos, p3.pos - p2.pos - 1)
From #testData td
Cross Apply (Values (concat(td.Value01, ';;;'))) As v(Value01) --Make sure we have delimiters
Cross Apply (Values (charindex(';', v.Value01, 1) + 1)) As p1(pos)
Cross Apply (Values (charindex(';', v.Value01, p1.pos) + 1)) As p2(pos)
Cross Apply (Values (charindex(';', v.Value01, p2.pos) + 1)) As p3(pos) --End of string/element
You could also create a function that parses out the elements and then just call the function using cross apply.