SQL Certified Expert is no longer available.
I would recommend
1Z0-071 (earns you an OCA)
1Z0-144 (optional. But you could use this to prepare for 1Z0-148. I did this exam because I had done SQL Certified Expert earlier.)
Hemant K Chitale
I too fall into the same position as Hemant. When the OCE-SQL exam (1Z0-047) was available, I took it and passed it. Then went for the OCA-PL/SQL (1Z0-144), then I started to study for the OCP-PL/SQL (1Z0-146) which is the 11g version. Then the 12c version exam (1Z0-148) came out but with different requirements (only 2 exams needed to achieve OCP), whereas 3 are needed for the 11g version.