目录引言：什么是 ETL 以及其重要性ETL 流程概述：提取、转换与加载的三个阶段文本文件读取的基础：提取阶段的起点文本编码问题：ASCII、Unicode 和 UTF-8 的处理非结构化文本处理：挑战与方法文本数据规范化：为后续
I have a very large database with about 120 Million records in one table.I have clean up the data in this table first before I divide it into several tables(possibly normalizing it). The columns of th
加载中,请稍侯......