anyone way to use a wildcard in a decode?

If I can manage this, I can condense about 10 insert statements into one and save alot of processing time.

anyway to do this with a straight decode?

ME>create table xx(y varchar2(20));

Table created.

ME>insert into xx values('ABCD');

1 row created.
ME>commit;

Commit complete.

ME>select decode(y,'%A%','XXXXX') from xx;

DECOD

1 row selected.

ME>select decode(y,'%A%','XXXXX','BLAH') from xx MASTER_TEST2_at_BOBAIRD>/ DECOD