Converting multiple Columns of a table into multiple Rows with all other rows repeating [duplicate]

Question

I have something like this

Id	ddf1	ddf2	ddf3	ddf4
1	223	112	221	500

I want something like this

Id	ddfs
1	223
1	112
1	221
1	500

I've other columns too in my query. So i want a solution which doesn't effect my other columns.

Answer 1

you can do something like this. See working fiddle here

select id,ddfs
from yourtable t cross apply
(values ('ddf1',t.ddf1),('ddf2',t.ddf2), ('ddf3',t.ddf3) ,('ddf4',t.ddf4)) v(k,ddfs)