oracle query to compare all the rows having same id in a table

Question

Need an sql query which results those records whose status is complete for a same id. For example, mytable is the table name which has various records. We need to

Answer 1

This will find the ids where all its rows have a status of complete:

SELECT id
FROM   mytable
GROUP BY id
HAVING COUNT(*) = COUNT( CASE status WHEN 'complete' THEN 1 END )