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SQL vs NoSQL: Kenapa PostgreSQL Masih Jadi 'Swiss Army Knife' di 2026
38+ min ago (23+ words) Sering kali kita... Tagged with postgres, mongodb, database, backend....
Operational simplicity: the cross-key tax, quantified
3+ hour, 54+ min ago (107+ words) Part 6 of 7 · ← Memory efficiency · Next: When to use which → Part 6. Throughput and latency are... Tagged with redis, database, performance, benchmarking....
Day 8 - Relational Database 101 - PostgreSQL Internals
9+ hour, 33+ min ago (1576+ words) একবার একটু technological দিকে আসি, আপনি যখন Facebook বা LinkedIn-এ কাউকে message করেন তখন সেটা সরাসরি তার কাছে send হয়। Reason হচ্ছে আপনারা connected। এখানে আপনি directly message ত…...
Why Parameterized Queries Matter for SQL Security
9+ hour, 53+ min ago (559+ words) SQL injection is one of the classic examples of what can happen when an application mixes user input directly into a database query. The underlying problem is simple. The application expects data. The database may interpret part of that data…...
Database Isolation Levels: What Can Concurrent Transactions Actually See?
6+ hour, 16+ min ago (743+ words) Transactions do not execute in isolation from reality. Isolation levels define how much of that reality they are allowed to observe. In the previous topic, we explored Optimistic and Pessimistic Concurrency Control. Now we can go one level deeper. What…...
Recursive CTEs: How SQL Secretly Learned to Loop
10+ hour, 48+ min ago (454+ words) Ask a SQL query to find "all employees under this manager," and things get ugly fast if you don't know how many levels deep the org chart goes. A regular join handles one level. Two joins handle two levels. Nobody's…...
The SQL Queries That Lie to You With a Straight Face
6+ hour, 49+ min ago (191+ words) Seven queries that run without error, return a result, and are still wrong — and how to stop writing them. Some SQL mistakes throw an error …...
EXPLAIN Describes a Query. Production Is Everything Else That’s Running.
8+ hour, 42+ min ago (1398+ words) A while back I wrote about migrating a terabyte of banking data from Oracle to PostgreSQL with no downtime. The part people …...
Every text-to-SQL benchmark score you've seen was measured without access control
13+ hour, 17+ min ago (955+ words) Spider, BIRD, LiveSQLBench. If you have evaluated a text-to-SQL system in the last five years you have quoted a number from one of them. All three ask the same question: given a schema and an English question, does the system…...
Expand, migrate, contract: the only database migration pattern a small team needs
22+ hour, 2+ min ago (195+ words) Small teams don't get a DBA or a staging cluster that matches production. The one rule that carries most of your safety: never change a live schema in place. Expand, migrate, contract. Why: on a 40M-row table, a naive in-place…...