I will write, debug, and optimize complex sql queries
About this Gig
Need fast, accurate & production-ready SQL queries?
I am a Senior Banking & Digital Analytics professional with 20+ years of experience in data warehousing, BI, and high-volume transactional systems. I specialize in writing and optimizing complex SQL queries for real production environments.
What I Offer
- Complex SQL queries (joins, CTEs, window functions, aggregations)
- Query optimization & performance tuning
- Stored procedures, views & functions
- Indexing recommendations & query rewrite
- Data extraction for reporting & BI
- Support for SQL Server, MySQL, PostgreSQL, Snowflake & HiveQL
Why Work With Me
- 20+ years in banking & large-scale data platforms
- Expertise in customer analytics, transaction analysis & KPI reporting
- Strong background in data warehousing, ETL & data modelling
- Focus on production-safe and maintainable solutions
- Clear communication & professional documentation
I make queries fast, reliable, and maintainable.
Please message me before ordering so I can understand your requirements.
Looking forward to working with you.
Platform:
MySQL
•
PL/SQL
•
SQL Server
•
Teradata
Expertise:
SQL
•
NoSQL
•
Performance
•
Query optimization
FAQ
Which databases do you support?
SQL Server, MySQL, PostgreSQL, Snowflake, TeraData and HiveQL.
Do you need access to my database?
Not always. Query text + table structure (or sample data) is usually enough. Temporary access can be arranged securely if needed.
Can you optimize slow queries?
Yes. I analyze execution plans, rewrite queries, and recommend proper indexing for better performance.
Do you provide documentation?
Yes. Premium package includes clear documentation of logic and optimization decisions.
Can you handle complex banking or analytics queries?
Yes. I have extensive experience with high-volume transactional data, customer analytics, KPI reporting, and regulatory data.

