How to write the data section when data is reused from a previous work? I am writing a paper where I am using the same dataset that was used in the previous work which I co-authored. I have written the data and the methodology part of that paper. In the new paper I am using the same dataset but a different approach and different methodology. 

When reusing the data, do I have to write a normal “data section” as in the previous paper, or I should rather give very general information and refer that first work if readers want to know more about the dataset?
Both papers will be part of my PhD thesis.
If the context is that of a three-paper dissertation, my opinion would be to refer to the earlier paper which has the thorough description. You should ask your supervisor to be sure, but a collection of essays allows that. A monograph type thesis is much preferable.

If the context is that of a journal submission, then each paper must be stand-alone and the data must be described in according detail. A self-citation is allowed, and some common phrases will save you time, but you cannot self-plagiarise and some rewriting is necessary. You can have one paper being more detailed than the other but the less detailed paper must still contain enough information. So yes, you should describe your data twice.