I think you meant: 
%hash = (
         abc => {
                 def => 1,
                },
         ghi => {
                 jkl => 1,
                },
);

[download]
Hashes use (), hash refs use {}.

delete($hash{abc}{def});

[download]
should work for deleting a second level key.

- Tom

In reply to Re: Deleting hash entry by tcf22
in thread Deleting hash entry by hotshot

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