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Fiverr Pro
Deutsch
$
USD
I will write, fix, and optimize sql queries for mysql postgresql and sql server
Backend and SQL Expert, High Performance Databases and APIs
I help startups, agencies, and growing businesses build reliable backends, high-performance databases, and scalable web systems.
I’m a Level 2 Fiverr seller with 220+ five-star reviews, specializing ...
Level 2
Hat hohe Leistungskriterien erfüllt und verfügt über eine nachgewiesene Erfolgsbilanz bei der Erfüllung von Kundenerwartungen.
Über diesen Service
Are you facing slow SQL queries, incorrect results, or complex reporting issues?
I am a Level 2 Fiverr seller with 220+ five-star reviews, specializing in writing, fixing, and optimizing SQL queries for MySQL, PostgreSQL, and SQL Server.
I can help you with:
- Writing complex SQL queries from requirements
- Fixing incorrect joins, group by, subqueries, and window functions
- Query performance optimization and indexing guidance
- Debugging existing queries and stored procedures
- Reports, dashboards, and data validation queries
I focus on accuracy, performance, and clean SQL logic not trial-and-error fixes. Your data integrity and production safety always come first.
Please message me before placing an order to review your requirements and avoid misunderstandings.
Plattform:
mySQL
•
PostgreSQL
•
SQLite
•
SQL Server
Expertise:
SQL
•
DDL
•
DML
•
Abfragenoptimierung
Mein Portfolio
Meine weiteren Dienstleistungen im Bereich Datenbanken
FAQ
Do you work with existing databases?
Yes, I can analyze and fix existing SQL queries without modifying your database structure unless approved.
Can you optimize slow queries?
Yes. I analyze execution logic and suggest optimizations, including indexing where applicable.
Do you support PostgreSQL?
Yes. I work with MySQL, PostgreSQL, and SQL Server.
Bewertungen
152 Bewertungen für diesen Service
| (148) | ||
| (3) | ||
| (1) | ||
| (0) | ||
| (0) |
Zusammensetzung der Bewertung
- Kommunikation
- Qualität der Lieferung
- Preis-Leistungs-Verhältnis der Lieferung
Sortieren nach:
Am relevantesten
M marcusheiner
Australien
This was our first experience with Fiverr, so we weren't sure what to expect. Faisal has been proactive and we're really happy with the work he has provided... We're booking him in for further work right now!
Bis zu 50 $
Preis
3 Tagen
Dauer
Hilfreich?M mjsport
Wiederkehrender Kunde
Großbritannien
Fantastic service
100 $-200 $
Preis
6 Tagen
Dauer
Hilfreich?C cedricmalong
Großbritannien
The work was excellent. He understood my request immediately and delivered promptly. I will contact him again for my future projects.
Bis zu 50 $
Preis
1 Tag
Dauer
Hilfreich?J 
justin559
Wiederkehrender Kunde
Vereinigte Staaten
This is by far the best person you could work with... truly amazed every time we work together on a project.
Bis zu 50 $
Preis
10 Tagen
Dauer
Hilfreich?J justin559
Wiederkehrender Kunde
Vereinigte Staaten
Just one of the best people you could find on Fiverr. Deep knowledge and willing to go above and beyond. Hire him.. you won't regret it.
Bis zu 50 $
Preis
8 Tagen
Dauer
Hilfreich?
Bewertungen
152 Bewertungen für diesen Service
| (148) | ||
| (3) | ||
| (1) | ||
| (0) | ||
| (0) |
Zusammensetzung der Bewertung
- Kommunikation
- Qualität der Lieferung
- Preis-Leistungs-Verhältnis der Lieferung
Sortieren nach:
Am relevantesten
M marcusheiner
Australien
This was our first experience with Fiverr, so we weren't sure what to expect. Faisal has been proactive and we're really happy with the work he has provided... We're booking him in for further work right now!
Bis zu 50 $
Preis
3 Tagen
Dauer
Hilfreich?M mjsport
Wiederkehrender Kunde
Großbritannien
Fantastic service
100 $-200 $
Preis
6 Tagen
Dauer
Hilfreich?C cedricmalong
Großbritannien
The work was excellent. He understood my request immediately and delivered promptly. I will contact him again for my future projects.
Bis zu 50 $
Preis
1 Tag
Dauer
Hilfreich?J justin559
Wiederkehrender Kunde
Vereinigte Staaten
This is by far the best person you could work with... truly amazed every time we work together on a project.
Bis zu 50 $
Preis
10 Tagen
Dauer
Hilfreich?J justin559
Wiederkehrender Kunde
Vereinigte Staaten
Just one of the best people you could find on Fiverr. Deep knowledge and willing to go above and beyond. Hire him.. you won't regret it.
Bis zu 50 $
Preis
8 Tagen
Dauer
Hilfreich?
