How to extract pattern from a table in Oracle 11g

I want to extract text from a column using regular expressions in Oracle 11g. I have 2 queries that do the job but I'm looking for a (cleaner/nicer) way to do it. Maybe combining the queries into one or a new equivalent query. Here they are:

Query 1: identify rows that match a pattern:

select column1 from table1 where regexp_like(column1, pattern);

Query 2: extract all matched text from a matching row.

select regexp_substr(matching_row, pattern, 1, level) 
from dual
connect by level < regexp_count(matching_row, pattern);

I use PL/SQL to glue these 2 queries together, but it's messy and clumsy. How can I combine them into 1 query. Thank you.

UPDATE: sample data for pattern 'BC':

row 1: ABCD
row 2: BCFBC
row 3: HIJ
row 4: GBC

Expected result is a table of 4 rows of 'BC'.