I am having trouble to pivot the following

```
    FirstName    LastName
    ----------------------
    Talyor       Swift
    Bruno        Mars

```

to the following

```
    ColumnName    ColumnValue
    --------------------------
    FirstName     Talyor
    LastName      Swift
    FirstName     Bruno
    LastName      Mars

```

I don't have any clue how to start this without hardcoding it especially the way to retrieve the column name from the system. 

\*\*Column Name in the source table is not given