Focuses on big data, data analysis, data warehousing, data middle platform, data science, Flink, AI and interview experience, side‑hustle earning and career planning.
This article explains Hive's partitioning and bucketing techniques, compares their purposes, advantages, and pitfalls, and shows how to combine them with concrete SQL examples to improve query performance, reduce I/O, and optimize joins and sampling in large data warehouses.
This guide outlines a concise, 1.5‑2‑minute self‑introduction for data engineering interviews, highlighting essential personal details, technical stack, project achievements, business impact, and common pitfalls to avoid, with a concrete example and actionable tips.
This guide walks you through designing and implementing a complete e‑commerce data‑warehouse project—from raw data ingestion and ODS/DWD/DWS/ADS layers to optional real‑time analytics—while highlighting interview‑ready resume tips, common pitfalls, and performance‑tuning tricks.
This article explains the definitions, core components, purposes, and real‑world examples of six architecture layers—business, product, application, data, technical, and project—and shows how they interrelate to form a complete system design framework.
This article analyzes the five typical pitfalls when designing DWS aggregation tables—from chimney‑style schemas to performance blind spots—explains their consequences, and provides concrete, production‑ready recommendations, code examples, and design principles to create reusable, efficient data‑warehouse layers.
Explore a comprehensive data governance guide covering naming conventions, data lifecycle classifications, layered architecture standards, inter-layer calling rules, and model design principles, providing practical standards and best practices for building robust, maintainable data warehouses and analytics platforms.
This article provides a comprehensive analysis of the ADS (Application Data Service) layer in a data‑warehouse architecture, covering its core positioning, design goals, modeling strategies, dimension‑optimization techniques, API services, typical challenges, and practical best‑practice recommendations for high‑performance, flexible, and secure data delivery.
The article explains how inconsistent "customer ID" fields across systems stem from a lack of unified data models, defines the difference between data modeling and data models, outlines three modeling stages, and compares three major modeling approaches—normative, dimensional, and entity—highlighting their purposes, processes, and trade‑offs.
This article walks you through why unmanaged data warehouses fail, outlines three golden governance principles, details five practical implementation steps—from building a data lineage map to creating business‑driven quality dashboards—and shares real‑world case studies and common pitfalls to help turn your data warehouse into a trusted decision‑making engine.
This article explains the distinct concepts of data domain and subject area, uses a library‑vs‑bookstore analogy, presents a real e‑commerce case, compares them in a concise table, and offers best‑practice steps and common pitfalls to help data teams design efficient data architectures.
