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Fiverr Pro
English
$
USD
I will write and optimize sql queries for mysql, postgresql, oracle, and sql server
C sharp, SQL Developer, ERP,Financial Data Systems Specialist
I am a seasoned enterprise software engineer. With many years of solid experience, I am proficient in C# (frontend & backend) and SQL database development. My specialization lies in crafting ERP and f...
About this Gig
LIMITED OFFER 30% off for the first 5 buyers!
Message me first and I'll send you a custom offer with the discount applied.
Offer ends after 5 orders grab it while it lasts!
Struggling with slow, broken, or overly complex SQL? I'll write it clean and right.
I design and write efficient SQL scripts tailored exactly to your database schema
and business logic with clear comments so your team can maintain them.
WHAT I CAN DO
- Complex SELECT queries JOINs, subqueries, CTEs, window functions
- Data manipulation INSERT, UPDATE, DELETE with safety checks
- Stored Procedures, Functions, and Triggers
- Query performance tuning and indexing strategy
- Debug and fix broken or slow SQL
- Schema design and table structure advice
- Reporting queries aggregations, grouping, pivoting
DATABASES I SUPPORT
- MySQL
- PostgreSQL
- Oracle (PL/SQL)
- Microsoft SQL Server
WHY CHOOSE ME
- 6+ years working with Oracle PL/SQL and enterprise data systems
- Code is clean, commented, and production-ready
- I test everything before delivery
- Clear communication no guessing games
Message me before ordering. Share your schema or describe your task and
I'll confirm the right package and timeline.
Platform:
MySQL
•
PL/SQL
•
PostgreSQL
•
SQL Server
Expertise:
SQL
•
Big data
•
Performance
•
Query optimization
FAQ
Do I need to share my database?
No — just send me your table structure (CREATE TABLE statements or a schema screenshot) and sample data. I'll write and test the query locally.
What if the query doesn't work on my end?
I'll fix it. Revisions are included and I'll debug until it works correctly in your environment.
Can you fix a query someone else wrote?
Yes, debugging and optimizing existing queries is one of my most common requests.
Do you support stored procedures with complex business logic?
Yes — the Standard and Premium packages include procedures and functions with full logic, error handling, and comments.
What if I don't know which database type I have?
Message me — a quick screenshot of your database tool is usually enough to identify it.
