SQL Group By and Partition By Scenarios: When and How to Combine Data in Data Science
Learn the generic scenarios and techniques of grouping and aggregating data, partitioning and ranking data in SQL, which will be very helpful in reporting requirements.
SQL的GROUP BY和PARTITION BY子句用于分组和聚合操作。GROUP BY按列分组并聚合数据,PARTITION BY按列分组并排序排名。这些功能在报表、分析、统计、数据清洗和群体分析中非常有用。