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Fiverr Pro
English
$
USD
I will debug and fix large sql views with complex logic and poor performance
About this Gig
I debug and optimize complex SQL queries and large SQL views that are slow, broken, or returning incorrect data.
With 8+ years of real-world experience, I work with multi-table joins, subqueries, CTEs, aggregations, and very large views/store procedure/plsql (300-600+ lines) used in production systems. I carefully analyze logic and performance, refactor queries, and optimize execution without breaking existing applications.
If you are non-technical, no problem I will explain the issue and solution in simple terms so you understand what was wrong and how it was fixed.
I help you:
- Fix incorrect SQL results
- Debug complex SQL logic
- Optimize slow queries and views
- Improve database performance safely
Supported databases: PostgreSQL, Oracle, MySQL.
Reliable, production-safe SQL debugging and optimization.
Platform:
MySQL
•
Oracle
•
PL/SQL
•
PostgreSQL
Expertise:
Design
•
ERD
•
Normalization
•
SQL
FAQ
What do you need from me to get started?
I will need your SQL query or view, database type (PostgreSQL, Oracle, or MySQL), and a brief description of the issue (slow performance, wrong data, error, etc.). If possible, sample data or expected output helps, but it’s not mandatory.
Can you work with very large or complex SQL views?
Yes. I regularly debug and optimize large SQL views (300–600+ lines) with complex business logic, multiple joins, and nested queries.
Will you change my data or database structure?
No, unless you explicitly request it. By default, I only modify queries, views, or indexes and focus on safe, non-destructive optimizations.
Will my production data be safe?
Yes. I work carefully and follow production-safe practices. If required, I can suggest testing changes in a staging environment before applying them to production.
Can you make my SQL faster without changing the result?
Absolutely. Performance optimization is done without altering the business logic or output, unless you ask for logic changes.
What if my issue is bigger than the selected package?
If the scope is larger, I’ll tell you honestly and suggest the correct package or a custom offer before starting.
Do you work with legacy or messy SQL code?
Yes. I frequently work with legacy, undocumented, or poorly written SQL and refactor it safely.
What databases do you support?
I support PostgreSQL, Oracle, and MySQL.
Do you offer ongoing or long-term support?
Yes. I offer monthly SQL support under the Premium package or via custom offers.
