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$
USD
I will write, fix and explain sql queries for mysql or sql server
Database and Systems Analyst, SQL, ERD, ASPNET Core
Computer Science graduate focused on database design, SQL, systems analysis and ASP.NET Core development. I can help with ER diagrams, relational database design, SQL queries, requirements analysis, u...
About this Gig
Need help with a SQL query that doesn't work, returns the wrong results, or you simply don't know how to write?
I can help you write, fix, debug and explain SQL queries for MySQL and Microsoft SQL Server.
I can help with:
- SELECT, INSERT, UPDATE and DELETE queries
- JOINs and relationships between tables
- GROUP BY, HAVING and aggregate functions
- Subqueries
- Filtering, sorting and calculations
- Debugging SQL errors
- Fixing queries that return incorrect results
- Query analysis and basic optimization
- Clear explanations of how the query works
What you will receive:
- Clean and readable SQL code
- A solution based on your database structure and requirements
- Comments or explanations when needed
- Suggestions for improvements where relevant
I work primarily with MySQL and SQL Server.
Please provide your database schema/table structure, the query you are working with (if you have one), the expected result, and any error messages.
If you're unsure which package fits your task, feel free to contact me before ordering.
Database type:
Relational database
Platform:
MySQL
•
SQL Server
Expertise:
SQL
•
DML
•
DQL
•
Query optimization
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Other Databases Services I Offer
FAQ
Which databases do you work with?
I primarily work with MySQL and Microsoft SQL Server. If you use another SQL database, please contact me before ordering and I can check whether I can help.
Can you fix an SQL query that is not working?
Yes. Send me your current query, relevant table structure, the error message or incorrect result, and explain what you expect the query to return.
Can you explain the SQL query instead of only providing the code?
Yes. I can provide a clear explanation of the query logic and explain JOINs, conditions, aggregations, subqueries and other relevant parts of the solution.
What information should I provide before you start?
Please provide the relevant table structure or schema, sample data if possible, your existing query if you have one, and a clear description of the result you need. Screenshots of errors can also be helpful.
Can you optimize a slow SQL query?
Yes, basic query optimization is available in the Premium package. Please provide the query, table structure and any relevant information about the issue. For complex performance or server-level problems, contact me before ordering.
