Join several files in Ubuntu

Joining all files under some folder:
cat *.csv  > full.csv

or

Joining specified files like:
cat *02.csv > 02.csv

201203-01.csv  201203-02.csv  201203-03.csv  201203-04.csv
201204-01.csv  201204-02.csv  201204-03.csv  201204-04.csv