Is there an easy way to convert a matrix like table to just two columns, one with the record ID and one with a Category representing the old columns (not sure how to phrase it)?
I have:
id foo bar baz
1 x
2 x
3 x
4 x x x
I want:
id category
1 foo
2 bar
3 baz
4 foo
4 bar
4 baz
The fourth row of the first tabe gets 3 rows in the new table since it has an 'x' for each column.
Please let me know if there is a better way to phrase this question or if this type of operation has name.