I will design your er diagram, convert it to relational schema and write sql queries

5.0
5.0

Italy

I speak English, Italian

2 orders completed

👋 Hi! I’m a Computer Science graduate (Italy 🇮🇹) with strong skills in software development, AI, and automation. I’m experienced in Java, C, Python, JavaScript (TypeScript), SQL, and C++, with hand...
About this Gig

I'm a Computer Science graduate with solid experience in relational databases, data modeling, and SQL.

This Gig is designed to support academic or professional database projects with clean structure and precise queries.

What I offer:

  • ER diagram design (Chen or Crows Foot)
  • Conversion to relational schema with key constraints
  • SQL queries: SELECT, JOIN, aggregation, subqueries
  • Query debugging, analysis, and optimization
  • Optional query scheduling and normalization (Premium only)

Package structure based on complexity:

  • Basic: up to 4 entities + 3 queries (debug + analysis)
  • Standard: up to 8 entities + 5 queries (with optimization)
  • Premium: up to 15 entities, normalization, 10 queries, scheduling

You'll receive clear diagrams and clean, commented SQL code ready to use or submit.

I also adapt to academic formats or company specifications - just send the instructions.

If you're unsure which package fits your needs, feel free to message me before ordering.

I'll be happy to help you build a reliable and well-structured database.

Database type:

Centralized database

Object-oriented database

Platform:

MySQL

PostgreSQL

SQLite

Expertise:

SQL

ER diagrams

Normalization

Performance

Reviews

2 reviews for this Gig
5.0

(2)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • W

    wasko55

    IT

    Italy

    5

    Dopo avergli spiegato cosa mi serviva, ha realizzato esattamente il lavoro che cercavo. È stato rapido nel rispondere ai messaggi e attento a comprendere ogni dettaglio. Consigliato!

    Up to $50

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • P

    partypankes

    IT

    Italy

    5

    I just needed a simple way to track my expenses, and this was exactly what I was looking for. I gave a rough idea of what I wanted, and they turned it into something that made sense and worked. Everything was delivered quickly, and communication was easy. Super happy with how it turned out!

    Up to $50

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
Reviews

2 reviews for this Gig
5.0

(2)
(0)
(0)
(0)
(0)
Rating Breakdown
  • Seller communication level
    5
  • Quality of delivery
    5
  • Value of delivery
    5
Sort By
Most relevant
  • W

    wasko55

    IT

    Italy

    5

    Dopo avergli spiegato cosa mi serviva, ha realizzato esattamente il lavoro che cercavo. È stato rapido nel rispondere ai messaggi e attento a comprendere ogni dettaglio. Consigliato!

    Up to $50

    Price

    1 day

    Duration

    Helpful?
    Yes
    No
  • P

    partypankes

    IT

    Italy

    5

    I just needed a simple way to track my expenses, and this was exactly what I was looking for. I gave a rough idea of what I wanted, and they turned it into something that made sense and worked. Everything was delivered quickly, and communication was easy. Super happy with how it turned out!

    Up to $50

    Price

    1 day

    Duration

    Helpful?
    Yes
    No