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$
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I will fix and optimize your sql queries
Python and Excel Expert for Data Cleaning Dashboards and SQL
Hi, I'm Nimra — a Software Engineering graduate who turns messy data into clean, decision-ready files. I use Python (pandas), Excel, and SQL to clean spreadsheets, fix and optimize SQL queries, and bu...
About this Gig
Got a SQL query that's broken, slow, or giving you wrong results? I'll fix it and explain what I changed so you actually understand it.
What I can do:
- Write queries from scratch (SELECT, JOINs, subqueries, GROUP BY)
- Fix queries returning wrong or unexpected results
- Optimize slow queries for better performance
- Build views, stored procedures, and triggers
Databases I work with:
MySQL, PostgreSQL, SQLite, SQL Server, BigQuery
What you get:
- A tested, working SQL query
- Comments inside the code explaining each part
- Plain-English explanation of what it does
- Unlimited revisions
Describe your problem and I'll tell you if I can help before you place an order.
Platform:
MS SQL
•
PostgreSQL
•
SQLite
•
SQL Server
Expertise:
SQL
•
Normalization
•
Performance
•
Query optimization
FAQ
Which databases do you support?
I work with MySQL, PostgreSQL, SQL Server (T-SQL), SQLite, and BigQuery. If you use a different database, message me — I may still be able to help.
Do I need to share my actual database?
No. You can share a sample of the data or just describe the table structure (column names and data types). I'll write and test the query based on that.
My query is slow — can you make it faster?
Yes, query optimization is one of my specialties. Share the query and tell me how long it currently takes to run. I'll analyze it and make it significantly faster.
Will you explain the query so I can understand it?
Absolutely. Every delivery includes comments inside the SQL and a plain-English explanation so you understand what it does and can modify it later if needed.
Can you write CTEs, window functions, and stored procedures?
Yes — these are included from the Standard package. If you're not sure which package you need, describe your requirement and I'll recommend the right one.
What if the query doesn't work correctly after delivery?
Every package includes unlimited revisions. If something isn't right, just let me know and I'll fix it — no extra charge, no questions asked.
