然而,从SQL Server 2005版本开始,引入了Pivot函数,提供了一种更简洁的方式来实现行转列。Pivot函数的语法如下: ```sql SELECT ... FROM table_source PIVOT ( 聚合函数(value_column) FOR pivot_column IN ...
culuo4781的博客sql中聚合函数和分组函数SQL has many cool features and aggregate functions are definitely one of these features, actually functions. While they are not specific to SQL, they are used often. They are...