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Deep technical explanations comparing database implementations. Not just what, but why and how they differ.
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Quick tips and gotchas in 60 seconds. Perfect for daily learning. PostgreSQL vs MySQL vs Oracle insights.
View ShortsWeekly Comparisons
Side-by-side analysis of database features with reproducible benchmarks and practical advice.
See ComparisonsReproducible Demos
Docker-based examples you can run locally. See the differences in action with real code.
Run Demos🚀 Current Focus: MVCC Across Databases
How Multi-Version Concurrency Control works differently in PostgreSQL, MySQL/InnoDB, Oracle, and SQL Server.
- PostgreSQL: Heap tuples with xmin/xmax
- MySQL/InnoDB: Rollback segments in undo tablespace
- Oracle: System Change Number (SCN) with undo segments
- SQL Server: Version store in tempdb
Try It Yourself
🐳 Docker Demo: MVCC Comparison
Run concurrent transactions in PostgreSQL, MySQL, and Oracle to see MVCC in action.
git clone https://github.com/oracleai/mvcc-demo.git cd mvcc-demo docker-compose up -d ./run_mvcc_test.sh
📊 Performance Comparison
Compare MVCC performance under concurrent read/write workloads across databases.
# PostgreSQL pgbench -c 50 -T 300 testdb # MySQL sysbench oltp_read_write --threads=50 --time=300 run
Upcoming Content
Topic #2: Foreign Keys
When to use them, performance implications, and implementation differences across databases.
Coming SoonTopic #3: Primary Keys
Surrogate vs natural keys. UUID, auto-increment, sequence, identity column comparisons.
Coming SoonTopic #4: Indexing Strategies
B-tree vs Hash vs GIN vs BRIN vs LSM. When each works best across different databases.
Coming Soon