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I will write, debug, and optimize mysql queries for power bi
Data Analyst Python SQL and Power BI
I am a Data Analyst skilled in Python, SQL, and Power BI.
I turn raw data into clear business insights through data cleaning, advanced SQL analysis, and interactive Power BI dashboards.
I have worked ...
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Is your Power BI dashboard loading slowly or showing wrong numbers?
90% of the time, the problem isn't Power BIit's the SQL query behind it.
I don't just write code; I write optimized, business-logic-ready SQL specifically designed to feed clean data into Power BI or Tableau. No messy joins, no Cartesian products, just fast and accurate results.
What I can do for you:
Write from Scratch: Turn your business question (e.g., "Monthly recurring revenue by region") into clean SQL.
Debug & Fix: Fix errors in your existing queries (Syntax, Logic, Join issues).
Optimize: Rewrite slow queries using CTEs, Window Functions, and proper indexing logic so your dashboard refreshes instantly.
My Tech Stack:
- MySQL / SQL Server / PostgreSQL
- Power BI / Tableau Integration
- Advanced SQL (CTEs, Subqueries, Window Functions)
Why choose me?
- I understand Data Analytics, not just coding. I know why you need the data.
- Every query is tested against sample data before delivery.
- Clean, commented code so you understand the logic.
Not sure if your query is "Simple" or "Complex"?
Message me your requirement first. Ill give you an honest assessment and the right package.
Tipo de base de datos:
Base de datos relacional
Plataforma:
mySQL
Mi porfolio
FAQ
FAQ 1: What database systems do you work with?
Ans: I specialize in MySQL. If your project uses PostgreSQL or SQL Server, message me before ordering and I'll confirm compatibility.
FAQ 2: Do I need to provide my database or dataset?
Ans: Yes — I'll need access to your database (or a sample dataset/schema) to write and test queries against real data, not just assumptions.
FAQ 3: Will these queries work directly in Power BI or Tableau?
Ans: Yes, all queries are structured and tested to plug directly into Power BI or Tableau without extra formatting.
FAQ 4: What if a query doesn't return the expected results?
Ans: I test every query before delivery, but if something's off after handoff, I'll debug and fix it within your package's included revisions.
FAQ 5: Can I request queries for a different database system, like MongoDB?
Ans: No — my current gigs cover relational (SQL) databases only. NoSQL/document databases aren't included in this service.
FAQ 6: What's included in "scheduled query execution" (Premium)?
Ans: I'll help set up your queries to run automatically at set intervals (e.g., daily/weekly) so your dashboard data refreshes without manual re-running.
FAQ 7: Can I get more queries than my package includes?
Ans: Yes — additional queries are available as a paid extra, listed under Gig Extras.
FAQ 8: How much detail should I provide about what I need?
Ans: The more specific, the better — table structure, sample data, and what the query should output (or what report/dashboard it feeds) helps me deliver faster and more accurately.
