KDP categories · Top KDP authors
Relational Databases: Amazon KDP category data
Amazon Books Best Sellers data for Relational Databases, updated Nov 2, 2026: median price $24, median 1 reviews, average rating 4.4 and a KDPTop opportunity score of 26/100 (highly competitive).
| Price range (middle 50%) | $17.55 – $34.99 |
|---|---|
| Average rating | 4.4 |
| New releases (90 days) | 19% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 0% of the parent category Databases & Big Data (233), one of the easier corners under it.
- Its review barrier is lower than in 99% of Books categories: the median best seller has only 1 reviews, so new books can chart with few.
- 19% of its best sellers came out in the last 90 days, more than in 89% of Books categories: readers here keep buying new titles.
Top 10 Relational Databases best sellers
-
SQL QuickStart Guide: The Simplified Beginner's Guide to Managing, Analyzing, and Manipulating Data With SQL (Coding & Programming - QuickStart Guides)
by Walter Shields
- List rank#1
- Price$19.36
- Rating4.6
- Reviews1,867
-
Oracle Database 26ai SQL and PL/SQL: The Complete Developer's Guide
by Vinish Kapoor
- List rank#2
- Price$39.99
- Reviews-
-
Hacking the System Design Interview: Real Big Tech Interview Questions and In-depth Solutions
by Stanley Chiang
- List rank#3
- Price$26.99
- Rating4.4
- Reviews218
-
SQL Crash Course: Learn essential skills in querying, security, and database management (English Edition)
by Thomas Liddle
- List rank#4
- Price$34.95
- Rating4.0
- Reviews3
-
SQLite for Beginners: Build Lightweight Databases for Python, Mobile, and Desktop Projects
- List rank#5
- Price$18.99
- Reviews-
-
Ship While You Sleep - 5 Claude Code Agents in 30 Days: Build the Overnight Fleet with Agents That Resume After a Crash, Never Collide and Hand You Finished Work by Morning. (The Overnight AI Team)
by J Cook
- List rank#6
- Price$21.99
- Reviews-
-
SQL Cheat Sheet, Cover all Basic SQL Syntaxes, Quick Reference Guide by Examples: SQL Programming Syntax Book, Syntax Table & Chart, Quick Study Workbook (Cheat Sheet Series)
by Sally Grey
- List rank#7
- Price$19.99
- Rating5.0
- Reviews2
-
Database Modeling for Software Engineers: A Practical Guide to Designing Reliable, Scalable, and High-Performance Databases for Modern Applications
by Paul Benson
- List rank#8
- Price$24
- Reviews-
-
Zero To SQL DBA: A Beginners, Intermediate, and Advanced reference and training manual
by Mr. Daryl Price
- List rank#9
- Price$35
- Reviews-
-
MySQL 9 Essentials: Deploying and Managing Databases with MySQL Server
by Neil Smyth
- List rank#10
- Price$30.99
- Reviews-
FAQ
Is Relational Databases a good niche for Amazon KDP?
Its KDPTop opportunity score is 26/100, which makes it highly competitive. The median best seller has 1 reviews and sells for $24.
How many reviews do you need to rank in Relational Databases?
The median best seller has 1 reviews, and 92% of them have fewer than 100.
What do Relational Databases best sellers cost?
The median price is $24; half of the best sellers are priced between $17.55 and $34.99.
Can new books break into Relational Databases?
19% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.