You will get expert SQL database queries with optimization & error-free results
Project details
Are your SQL queries running slow, giving wrong results, or too complicated to maintain?
You’ve found the database expert who will fix it — quickly and professionally.
✅ My Services Include:
Custom SQL Query Creation (simple to advanced)
Optimization for Speed & Performance (Indexing, Query Plans)
Stored Procedures, Views & Triggers Development
Database Normalization to 1NF → 3NF (No redundancy)
Error Fixing, Debugging & Data Recovery
Joins, CTE, Window Functions & Dynamic Queries
Data Migration Between Systems
Analytical Reports, Dashboards & Views
Transactions, ACID, Security Roles, Privileges
✅ Supported Databases
MySQL
PostgreSQL
SQL Server
Oracle
SQLite
MariaDB
✅ Why Clients Choose Me
✔ Professional Computer Science background
✔ 100% Accuracy — no broken queries
✔ Clear documentation & delivery reports
✔ On-time, every time
✔ Excellent communication & support
Let’s turn your data into powerful business insights!
You’ve found the database expert who will fix it — quickly and professionally.
✅ My Services Include:
Custom SQL Query Creation (simple to advanced)
Optimization for Speed & Performance (Indexing, Query Plans)
Stored Procedures, Views & Triggers Development
Database Normalization to 1NF → 3NF (No redundancy)
Error Fixing, Debugging & Data Recovery
Joins, CTE, Window Functions & Dynamic Queries
Data Migration Between Systems
Analytical Reports, Dashboards & Views
Transactions, ACID, Security Roles, Privileges
✅ Supported Databases
MySQL
PostgreSQL
SQL Server
Oracle
SQLite
MariaDB
✅ Why Clients Choose Me
✔ Professional Computer Science background
✔ 100% Accuracy — no broken queries
✔ Clear documentation & delivery reports
✔ On-time, every time
✔ Excellent communication & support
Let’s turn your data into powerful business insights!
Database Type
MySQL, MS SQL, MS Access, Oracle, SQLite, PostgreSQL, MongoDBWhat's included
| Service Tiers |
Starter
$20
|
Standard
$80
|
Advanced
$100
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 5 days |
Number of Revisions | 2 | 3 | 5 |
Number of Queries | 4 | 2 | 1 |
Query Debugging | |||
Query Optimization | |||
Query Scheduling | |||
Query Analysis | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$20 - $50
Additional Query
(+ 1 Day)
+$20Frequently asked questions
About Stephen
Data Analyst & Statistical Modeling Expert
Maseno, Kenya - 1:11 am local time
Looking for a reliable Data Analyst who can transform your raw data into decision-ready insights — and clearly explain what those insights mean for your business or research?
I’m Stephen Murigi Mwangi, a Statistics expert with 4+ years of experience delivering accurate analysis, professional reports, and clean visual dashboards that help clients achieve results faster.
✅ What I Deliver
✔ Statistical analysis — Hypothesis testing, Regression, ANOVA, Time-series, Forecasting
✔ Data cleaning & automation — Python, R, Pandas, SQL, Excel
✔ Data visualization — Tableau, Power BI, Seaborn, Matplotlib
✔ Machine learning — Classification, prediction models with clear interpretation
✔ Academic & business research — APA/MLA/Harvard formatting, citations, methodology
✔ Dashboard development — Interactive web dashboards for real-time decisions
✅ Why Work With Me?
⭐ Fast turnaround — without compromising quality
⭐ Clear communication — insights simplified for non-technical audiences
⭐ 100% confidentiality & originality — especially for academic projects
⭐ Unlimited revisions within the project scope
⭐ I collaborate — not just complete tasks
Every project I deliver includes:
📌 A professional report with charts + findings
📌 Actionable recommendations
📌 Clean datasets and scripts for future use
✅ Tools & Skills
Python | R | SPSS | Jamovi | SQL | Excel | Tableau | Power BI | Scikit-learn | React | Django
Industries Served:
Business • Education • Government • Healthcare • Market Research • Finance
🚀 Let’s Work Together
Whether you’re:
✅ A researcher needing accurate statistical support
✅ A startup looking for business insights
✅ A company exploring your market or customer behaviors
I’ll make your data clear, accurate, and valuable.
📩 Send me a message — I’m ready to start today.
Steps for completing your project
After purchasing the project, send requirements so Stephen can start the project.
Delivery time starts when Stephen receives requirements from you.
Stephen works on your project following the steps below.
Revisions may occur after the delivery date.
Collect and review database access, business logic, and expected output.
I will analyze your current database structure, queries, and reporting needs to ensure we fully understand your goals and data flow before starting development.
Design optimal SQL logic to meet requirements efficiently.
I will prepare the query logic using best practices — selecting appropriate indexing, joins, and filtering strategies for maximum accuracy and performance.