SQL Server : Columns to Rows

Question

Looking for elegant (or any) solution to convert columns to rows.

Here is an example: I have a table with the following schema:

[ID] [EntityID] [Indi         


        

Answer 1

Just because I did not see it mentioned.

If 2016+, here is yet another option to dynamically unpivot data without actually using Dynamic SQL.

Example

Declare @YourTable Table ([ID] varchar(50),[Col1] varchar(50),[Col2] varchar(50))
Insert Into @YourTable Values 
 (1,'A','B')
,(2,'R','C')
,(3,'X','D')

Select A.[ID]
      ,Item  = B.[Key]
      ,Value = B.[Value]
 From  @YourTable A
 Cross Apply ( Select * 
                From  OpenJson((Select A.* For JSON Path,Without_Array_Wrapper )) 
                Where [Key] not in ('ID','Other','Columns','ToExclude')
             ) B

Returns

ID  Item    Value
1   Col1    A
1   Col2    B
2   Col1    R
2   Col2    C
3   Col1    X
3   Col2    D