Column names in result and rotate part of table - sql

Question

The following a table structure:
'----ID-----'----NAME----'----FIELD1----'----FIELD2----'
' 1 ' val ' 123 ' 321 '
' 2 ' val2 ' 234 ' 212 '
Need to get the following result:
'----ID-----'----NAME----'----FIELDS----'----VALUES----'
' 1 ' val ' FIELD1 ' 123 '
' 1 ' val ' FIELD2 ' 321 '
' 2 ' val2 ' FIELD1 ' 234 '
' 2 ' val2 ' FIELD2 ' 212 '
How write this query? I can get column names from INFORMATION_SCHEMA.COLUMNS. But how to join table with INFORMATION_SCHEMA.COLUMNS? Also how can rotating a part of table?
As living example. Following is table:
On screenshot only several fields but in table there are a lot of fields. I wrote the following query:
Select p.GUID, p.myvalues, p.Fields
from myTable gz
unpivot( [myvalues] for Fields in ([area], [davlplastmax])) p
But this query doesn't return null values.
Also I want get columns from INFORMATION_SCHEMA.COLUMNS and past them in ([area], [davlplastmax]).
For example:
unpivot( [values] for Fields in (
SELECT [MyDb].INFORMATION_SCHEMA.COLUMNS.COLUMN_NAME
FROM [MyDb].INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = N'MyTable'
)

Answer 1

Unpivot?
select u.id, u.name, u.fields, u.values
from MyTable t
unpivot
(
values
for fields in (Field1, Field2)
) u;

Answer 2

You can use unpivot as below:
Select * from #data
unpivot( [values] for Fields in ([Field1],[Field2])) p
Output as below:
+----+------+--------+--------+
| Id | Name | values | Fields |
+----+------+--------+--------+
| 1 | val | 123 | Field1 |
| 1 | val | 321 | Field2 |
| 2 | val2 | 234 | Field1 |
| 2 | val2 | 212 | Field2 |
+----+------+--------+--------+
You can use dynamic query as below for getting columns from Information_Schemas
Declare #cols1 varchar(max)
Declare #query nvarchar(max)
Select #cols1 = stuff((select ','+QuoteName(Column_Name) from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = 'TestData'
and COLUMN_NAME not in ('Id','Name') for xml path('')),1,1,'')
Select #query = ' Select * from
(Select * from #data )a
unpivot( [values] for Fields in (' + #cols1+ ')) p '
Exec sp_executeSql #query