B-Tree (Balanced Tree) indexes are PostgreSQL’s default index type for good reason. They maintain sorted data in a tree structure where each node contains multiple keys, enabling efficient range…
Read more →Indexes are data structures that databases maintain separately from your tables to speed up data retrieval. Think of them like a book’s index—instead of reading every page to find mentions of ‘SQL…
Read more →Every time you query a database, search a file system directory, or look up a key in a production key-value store, you’re almost certainly traversing a B-Tree. This data structure, invented by Rudolf…
Read more →Binary search trees are elegant in memory. With O(log₂ n) height, they provide efficient search for in-memory data. But databases don’t live in memory—they live on disk.
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