How to separate one column to multiple using conditions in SQL Server - sql-server

Question

I want separate one column into multiple columns based on condition.
Table : emp
CREATE TABLE [dbo].[emp]
(
[name] [varchar](200) NULL,
[id] [int] NULL
) ON [PRIMARY]
GO
INSERT [dbo].[emp] ([name], [id])
VALUES (N'lux-pen-oxo-mobile', 1),
(N'pne-soap', 2),
(N'hop-pen-mobile-soap-jad', 3),
(N'pen-soap-box', 4)
Based on the above data I want output like below :
id |prod1 |prod2 |prod3 |prod4 | Prod5
1 |lux |pen |oxo |mobile |
2 |pne |soap | | |
3 |hop |pen |mobile |soap |jad
4 |pen |soap |box |
I tried like this:
select
id,
case
when charindex('-', name) > 0
then substring(name, 1, charindex('-', [name]) - 1)
end prod1,
substring(name, charindex('-', [name], 2) + 1, len(name)) prod2,
substring(name, charindex('-', [name], 3) + 1, len(name)) prod3,
substring(name, charindex('-', [name], 4) + 1, len(name)) prod4,
substring(name, charindex('-', [name], 5) + 1, len(name)) prod4
from
[emp]
This query not returning the expected result.
Please tell me how to write a query to achieve this task in SQL Server.

Answer 1

You can do it using CTE like following example.
;WITH Split_Names (ID,xmlname)
AS
(
SELECT ID,
CONVERT(XML,'<Names><name>'
+ REPLACE(Name,'-', '</name><name>') + '</name></Names>') AS xmlname
FROM [dbo].[emp]
)
SELECT ID,
xmlname.value('/Names[1]/name[1]','varchar(100)') AS prod1,
xmlname.value('/Names[1]/name[2]','varchar(100)') AS prod2,
xmlname.value('/Names[1]/name[3]','varchar(100)') AS prod3,
xmlname.value('/Names[1]/name[4]','varchar(100)') AS prod4,
xmlname.value('/Names[1]/name[5]','varchar(100)') AS prod5
FROM Split_Names
OUTPUT
+----+-------+-------+--------+--------+-------+
| ID | prod1 | prod2 | prod3 | prod4 | prod5 |
+----+-------+-------+--------+--------+-------+
| 1 | lux | pen | oxo | mobile | NULL |
+----+-------+-------+--------+--------+-------+
| 2 | pne | soap | NULL | NULL | NULL |
+----+-------+-------+--------+--------+-------+
| 3 | hop | pen | mobile | soap | jad |
+----+-------+-------+--------+--------+-------+
| 4 | pen | soap | box | NULL | NULL |
+----+-------+-------+--------+--------+-------+
If you want to replace NULL with '', in that case you can change the columns in select like following.
ISNULL(xmlname.value('/Names[1]/name[1]','varchar(100)'),'') AS prod1 ,
Live Demo