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I will write, fix and optimize your sql queries
About this Gig
Need help writing, fixing or improving your SQL queries?
I'm a professional Data Consultant with hands-on experience in Oracle SQL, ETL processes, data transformation and complex database queries.
What I can help you with:
- Write SQL queries from scratch
- Debug and fix SQL errors
- Create JOINs, subqueries and CTEs
- Use GROUP BY, aggregations and analytical functions
- Work with ROW_NUMBER, RANK and CASE WHEN
- Review and optimize existing SQL queries
- Improve query readability and structure
Why choose my service?
- Professional experience working with large datasets
- Strong Oracle SQL knowledge
- Clean, well-structured SQL code
- Clear explanations and reliable communication
- Attention to detail and data confidentiality
What I need from you:
Please provide your database platform, table structures, expected results and a description of the problem.
My packages cover queries of agreed complexity. Advanced optimization or larger projects may require a custom offer.
Please contact me before ordering so we can confirm your requirements.
Database type:
Relational database
Platform:
Oracle
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PL/SQL
Expertise:
SQL
•
DML
•
DQL
•
Query optimization
FAQ
Which databases do you work with?
I primarily specialize in Oracle SQL and PL/SQL. Please contact me before ordering if you use another database platform. Copiar respuesta
Can you fix SQL queries that return errors?
Yes. I can review your SQL code, identify errors and provide a corrected query with an explanation. Please share the error message and relevant table structures. Copiar respuesta
Do you need access to my database?
No. In most cases, table structures, sample data and expected results are enough. Please avoid sharing passwords, credentials or confidential information.
