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为什么数仓模型建设离不开数据宽表?
宽表更注重数据的扁平化和查询的简便性。 数据产品求职面试涉及到数据知识的问题时,经常会涉及到数据宽表的相关问题,因为宽表具有简化查询、提高分析效率等优势。 一、宽表的概念 宽表(Wide Table)是指字段(列)较多的数据库表。它通过关联字段将 ...
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