I am afraid you will have to wait at the Greek calends.
Once MySql company had a wonderful oracle clone. It was MaxDB, formerly SAPDB. And lots of people thought they would drop ugly MySql database and replace it by MaxDB. But they returned it back to SAP in 2007.
You shouldn't compare the two. It's like comparing a school bus (Oracle) to a Corvette (MySql). Oracle can deliver tons of data in a reasonable amount of time consistently. MySql can deliver smaller amounts of data in a much faster time consistently. How big is the db and how frequent will it receive requests? Are you planning on having millions of users querying the db every 3 seconds? If so, Oracle should be your choice (or even better, IBM DB2). However, if you are predicting <10000 users and average query of 5 per minute or less, MySql will do all you have ever hoped for.
Yes, Oracle is a beast and a memory hog. My favorite comparison was made by Charles Phillips, President of Oracle:
"We're both in the transportation business," Mr Phillips said. "We have a 747, and they have a Toyota."
Marten Mickos, CEO of MySql responded:
"There are many more Toyotas sold than 747s. "Toyota is a very profitable company"