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I will write, fix and debug mysql sql queries
Data analyst
Data analyst & SQL/database developer. I design normalized MySQL/PostgreSQL databases (schemas, roles, triggers, stored procedures) and turn messy data into clean, actionable insights using Python (Pa...
Acerca de este Servicio
Having trouble with a MySQL query or need SQL written from scratch?
I can help you write, fix, debug, and improve MySQL SQL queries based on your database structure and the result you need.
I can assist with:
- SELECT, INSERT, UPDATE and DELETE queries
- WHERE, ORDER BY and filtering
- JOINs between multiple tables
- GROUP BY and HAVING
- Aggregate functions
- Subqueries and CTEs
- CASE statements
- Views
- Stored procedures and functions
- SQL syntax and logic errors
- Queries returning incorrect results
- Basic query optimization
- Database reporting queries
You will receive clean and readable SQL code, with comments or an explanation depending on your selected package.
To get started, please provide your table structure or CREATE TABLE statements, your current query if you have one, any error message, and a clear description of the result you expect.
For complex queries, stored procedures, or larger projects, please message me before ordering so I can confirm the correct package.
Plataforma:
mariadb
•
mySQL
Experiencia:
SQL
•
DDL
•
DML
•
DQL
Mi porfolio
FAQ
What information do you need to start?
Please send your table structure or CREATE TABLE statements, the SQL query you are working with, the error message if there is one, and a short description of the result you expect.
Do I need to give you access to my database?
No. In most cases, database access is not necessary. You can send the table structure, sample data, and your current query. Please do not send passwords or sensitive login credentials.
What types of SQL queries can you help with?
I can help with SELECT, INSERT, UPDATE, DELETE, JOINs, GROUP BY, HAVING, aggregate functions, subqueries, CASE statements, CTEs, views, stored procedures, and other MySQL queries depending on the selected package.
Do you work only with MySQL?
My main service is focused on MySQL and MariaDB. If you use another SQL database, please contact me before ordering so I can confirm whether I can work with it.
Can you write SQL queries from scratch?
Yes. Send me your database structure, sample data if available, and clearly describe the result you need. I can create the required SQL query based on your requirements.
What counts as one query?
One query is one specific SQL task or requested result. If a solution requires several related SQL statements, stored procedures, or multiple separate outputs, please contact me first so I can confirm the correct package.
Should I contact you before ordering?
For one simple query or error, you can usually order directly. Please contact me first for complex JOINs, stored procedures, multiple queries, large database tasks, or unusual requirements so I can confirm the correct package.
