plpgsql before insert update delete - Mailing list pgsql-sql

hi all.

i'd like to noe how to create trigger which will insert tablez old data 
into an archive table before any(insert,update,delete) operation is 
executed.

i've tried "if inserting ...." but it didnt work.
is there any function that will do it?

any help will be greatly appreciated.

thanx.

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