Building a Scalable Weighted Random Sampler in PostgreSQL
Explore methods for performing weighted random sampling in SQL, moving from simple heuristics to mathematically precise algorithms and efficient precomputed distributions.
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6 posts tagged with this topic
When MySQL 8 Stopped Respecting Implicit Ordering
Upgrading to MySQL 8 reveals hidden dependencies on implicit row ordering as the optimizer gains flexibility. Explicitly defining query order ensures consistency in data retrieval.
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Building Prefix Search Autocomplete Using Trigram Indexing
Implementing a high-performance autocomplete system using native PostgreSQL features like trigram indexing for prefix matching and typo tolerance.
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Batch Based Approaches to Updating Large Tables in PostgreSQL
Batch processing updates prevents long-held locks and database pressure in large tables, using either integer ID increments or state-based filtering to manage performance.
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Moving Beyond Offset Pagination in Production Systems
Moving beyond basic LIMIT and OFFSET allows developers to handle massive datasets more efficiently while maintaining high performance and data consistency.
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Working with Spatial Data in SQL using PostGIS Geometry and Geography
PostGIS bridges the gap between relational databases and geographic information systems, enabling efficient spatial analysis and proximity queries directly within PostgreSQL.
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