Derek Xu is seeking a position as an Oracle/SQL Server DBA with over 10 years of experience in database administration. He has extensive experience installing, configuring, patching, and upgrading Oracle and SQL Server databases. He is proficient in database performance tuning, high availability solutions like RAC and Data Guard, backup/recovery, and resolving database issues. Derek has worked with databases ranging from 1TB to 2TB in size and has 24x7 experience supporting critical systems. He is skilled in PL/SQL, T-SQL, Unix scripting, ETL tools, and data warehousing technologies.

1. Derek Xu
31 Atlas Peak Dr, Markham, Ontario, L6C 3H8
Email: derekxuxu@gmail.com
Telephone: (416)-5574840 (cell) (905) 534-0680 (Home)
Career Objective
Seeking a position as an Oracle/SQL Server DBA(Database Administrator) in a dynamic environment, in
which I can fully utilize my knowledge and skills to contribute significantly toward your objective.
Qualification Summary
 10+ years direct working experience in Oracle Corporation and 8+ years in Bell Canada. A
highly qualified, result driven information technology professional with extensive experience in
database administration, software installation and patching, scripting/programming, systems
analysis, and technical support.
 Possesses a proven ability to improve database performance, ensure maximum uptime and data
integrity, and rapidly solve problems.
 A hard-working team player and friendly communicator to meet performance goals, works
independently, and consistently exceeds expectations.
Technical Skills
Database: Oracle 7/8i/9i/10/11G/12c, RAC, Data Guard, Oracle EBS 11i technology
Framework, RMAN, Statspack/ADDM, SQL*Loader, SQL Server 2005,
MySQL5.0
Tools: Oracle 10g Enterprise Manager Grid Control, Tomcat, Warehouse Builder,
Developer Suite9i (Forms and Reports), Designer6i, and Erwin
Programming Languages: SQL, PL/SQL, Perl, PHP, C/C++, Pro*C++, Java/J2EE, EJB, XML,T-SQL,
XML, IIS6.0, TCP/IP, VB.Net, ASP.Net, C#, VB, VC++, SharePoint
Operating Systems: IBM AIX, HP UX, Sun Solaris, Linux, IBM OS/390, CICS, VSAM, Windows
Relevant Experience
Oracle DBA Bell (Mobility) Canada Toronto Canada Jan 2009 -
Present
 Installed and managed Oracle 10g/11g/12c RAC and Data Guard and tested with kinds of Oracle
10g/11g/12c RAC services configuration to support 2TB Online charging system.
 Providing trouble-shooting and resolution 24x7 support for database incidents. Monitoring
Databases using Oracle 10g Enterprise Manager Grid Control
 Implemented RMAN backup on the new databases and worked closely with the storage team to
tune the RMAN performance on the databases especially TB size Online charging system. Tested
the recovery regularly
 Managed Oracle multi-master Databases replication for Bell AAA billing system and tested
Oracle Golden Gate for active-active data replication for Online charging system
Oracle/SQL Server DBA Tucows Corporation Toronto Canada Mar 2006 - Nov 2009
 Participated Oracle 10g RAC upgrade for all Customer and Billing databases at Tucows. The
Customer and Billing databases with size up to 1.2TB
 Tuned Customer and Billing databases based on Statspack report; partitioned and reorganized
tables and indices when needed. Reviewed and approved all the SQL and PL/SQL scripts before
applying to the production databases and tuned the SQL and PL/SQL when needed.
 Designed and wrote ETL processes using DTS package to transform and load data into operation
data, then into Oracle 10g based Data Warehouse and Data Marts
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2.  Design and schedule large data imports, exports or transformation SSIS packages
 Reviewed existing SQL Server 2005 Database design, conducted performance tuning on existing
SQL queries, stored procedures, and triggers to resolve performance issues
Derek Xu Phone# (416) 557- 4840 Email: derekxuxu@gmail.com Page 2 of 2
Oracle DBA Oracle Corporation 1994 - 2005
 Defined OLAP structure such as Oracle Dimension, Cube, measure to meet analysis requirements
 Designed Oracle Start Schema and Lookup tables, extracted/transformed/loaded data from OLTP
system using Oracle Warehouse Builder
 Created partitioned tables and indexes, bitmap and function based indexes and materialized views
to improve the performance of the billing database
 Implemented Statspack on all production databases and used the reports to improve their
performance
 Performed many database upgrades using import/export and the Oracle Migration Assistant from
Oracle 8i to 9i, Installed Oracle 9i client on numerous NT servers
 Maintained Data Warehouse database, installed Warehouse builder version 9.0.4, built the
repository for it and assisted in the move from version 9.0.2
 Wrote multiple Unix scripts, including one to refresh a test database from production on a nightly
basis through a cron job
 Answered technical questions about Oracle 7.x/8i/9i Database with Oracle Metalink and WebIV
 Implemented software and database installations and configuration for new databases services and
products according to Bank of China database infrastructure and security standards and best
practices
 Developed a scalable web query system that collects data from Oracle Financial Application with
timely and accurate information
 Analyzed and designed the System with Oracle Designer and Erwin
 Developed business intelligence system with Oracle Forms, Reports, Discoverer, PL/SQL,
Database Trigger, Stored Procedure
 Implemented the System on Oracle Application Server and tested Backup/Recovery plan of the
System
 Tuned the System with Oracle Enterprise Manager and converted SQL Server Data to Oracle 8.0
Oracle Developer/DBA Information Center of Ministry of Coal Industry, Beijing 1985 – 1994
 Installed, patched, configured, upgraded and maintained Oracle 6.x and 7.x database and related
software, managed users and maintained security,
 Held responsibility for the database performance and helping the developer with any Oracle
related questions, including SQL tuning.
 Maintained and created Oracle instances, modified database structures, participated in database
logical and physical design
 Developed a Financial Query System for internal customers through Oracle Forms &Reports and
COBOL, ISPF based on IBM OS/390 mainframe
Education/Training & Award
Oracle 9i OCP 2004
Oracle Golden Gate training 2011
“Excellent Employee” awarded by Oracle Corporation 1999
“Excellent Employee” awarded by Oracle Corporation 1997
Bachelor Degree, Computer Science Department
Jilin University 1985
*Reference Available Upon Request.
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