Your question isn't clear. I'm guessing that you are asking for the exam numbers required for the Oracle 10G DBA OCA certification. There are two tests required, a SQL component and a DBA component.
The SQL component can be any one of the following three:
1Z0-007: Introduction to Oracle9i SQL
1Z0-047: Oracle Database SQL Expert
1Z0-051: Oracle Database 11g: SQL Fundamentals I
Of the three I generally recommend taking 1Z0-051. Since I'm not positive that I'm even answering the right question, I won't go into details on why.
The DBA component is:
1Z0-042: Oracle Database 10g: Administration I
If this wasn't your question, please provide more details on exactly what you want to know.