SQL Query for conditional selecting -

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i have question how retrieve data 1 customer's order table (oracle) this:

id   customer cake          top    1    001      chocolate     cream 2    002      chocolate     jam 3    002      vanilla       cream 4    003      banana        cream

i want know orders customers order includes chocolate cake.

the right result should 

id   customer cake          top    1    001      chocolate     cream 2    002      chocolate     jam 3    002      vanilla       cream

i 2 separate queries in sql, there way in single query?

many thanks!

you should use sub-query customers:

select * order customer in (   select distinct customer order cake = 'chocolate' )

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