如何使用 t-sql 拆分多个字符串

Question

I have tried to split this string but unsuccessful because of the way the string is arranged in the column. The Null value keeps appearing on the Make and model column and the actually data goes to the wrong column

Sample data:

MakeModelColor
Apple - iphone 12
Apple - iphone 12 pro max - black -128gb
Samsung - galaxy A12

This is the result I am looking for:

Make	Model
Apple	iphone 12
Apple	iphone 12 pro max
Samsung	Galaxy A12

Actual result am looking for ]( https://i.stack.imgur.com/BvzYN.png )

Answer 1

Just another option using a bit of JSON

Example

 Select Make  = trim(JSON_VALUE(JS,'$[0]'))
       ,Model = trim(JSON_VALUE(JS,'$[1]'))
 From  YourTable A
 Cross Apply (values ('["'+replace(string_escape([MakeModelColor],'json'),'-','","')+'"]') ) B(JS)

Results

Make            Model
Apple           iphone 12
Apple           iphone 12 pro max
Samsung galaxy  A12

Answer 2

That could be done in a number of ways. ie:

with data(makeModelColor, part, ordinal) as (
  select makeModelColor, ltrim(rtrim(value)), ordinal
from devices
cross apply (select * from String_Split(devices.makeModelColor,'-',1)) t)
select makeModelColor,
  max(case when ordinal = 1 then part end) as Make,
  max(case when ordinal = 2 then part end) as Model,
  max(case when ordinal = 3 then part end) as Color,
  max(case when ordinal = 4 then part end) as Other
  from data
group by makeModelColor;

DBFiddle demo