
SQLZOO
DataLemur
LeetCode
The Odin Project
HackerRank
LiveEdu.tv
Codecademy
SQLBolt provides a set of interactive lessons and exercises to help you learn SQL

Mem0
Memori
Agentmemory
Supermemory
Tempreon
cognee
TheSecondBrain.dev
Portable, verifiable memory for AI agents — works across ChatGPT, Claude, Gemini and any MCP client

Which is more popular?
Based on our record, SQLBolt seems to be more popular. It has been mentioned 126 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | sqlbolt.com | chainmemory.ai |
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In their own words, as submitted to SaaSHub.


No description of SQLBolt yet.
ChainMemory gives your AI agents persistent memory that belongs to YOU — not to a single vendor. Save a memory in ChatGPT, recall it in Claude or Gemini. Available via Chrome extension, MCP server (npm), or REST API. Every memory gets a cryptographic fingerprint and project states are anchored...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
SQLBolt is recommended for beginners who are new to SQL or those with limited experience who need a refresher on basic concepts. It is also useful for anyone who prefers learning through interactive and practical exercises rather than purely theoretical content.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Learn SQL in 2 Hours | SQLBolt Solutions
No ChainMemory videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using SQLBolt and ChainMemory. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


The fastest way to make it stick is to run each query yourself. Start with the examples in this post, then move to SQLBolt. When you're comfortable, import a CSV you actually care about and try the same statements on it. Once you've... - Source: dev.to / 5 days ago
Disclosure: I help build these simulators; they are part of 50+ free DevOps games and simulators. For more practice beyond them, SQLBolt and PostgreSQL Exercises are excellent and free, and SQL Murder Mystery is the most fun anyone has... - Source: dev.to / 2 months ago
I hope this helps you with interview prep as it does to me. I find https://sqlbolt.com/ super helpful if you want to learn SQL queries in depth. Thanks! - Source: dev.to / 9 months ago
Tracking ChainMemory since Jul 2026.
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Practice SQL Interview Questions & Data Science Interview Questions asked by FAANG.
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Persistent memory from agent trace, not just conversation
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Practice and level up your development skills and prepare for technical interviews.
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Persistent memory for Claude Code, Codex & coding agents
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