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sqlserver行转列和列转行

一、行转列原理 SQL Server中的行转列操作是通过使用PIVOT和UNPIVOT关系运算符来完成的。 PIVOT操作符将表值表达式中的某一列中的唯一值转换为输出中的多个列，并在必要时对最终输出中所需的任何其余列值执行聚合。这使得多行的数据可以按照指定的列名进行重新分组，并且每行数据的每个列都...

数据库：SQLServer 实现行转列、列转行用法笔记

在许多的互联网项目当中，报表开发是整个项目当中很重要的一个功能模块。其中会有一些比较复杂的报表统计需要行转列或者列转行的需求。今天给大家简单介绍一下在SQLServer当中如何使用PIVOT、UNPIVOT内置函数实现数据报表的行转列、列转行。有需要的朋友可以一起学习一下。一、PIVOT、UNPIV...

重温SQL Server的行转列和列转行，面试常考题

我们首先先通过一个老生常谈的例子，学生成绩表(下面简化了些)来形象了解下行转列CREATE TABLE [StudentScores]( [UserName] NVARCHAR(20), &...

做图表统计你需要掌握SQL Server 行转列和列转行

原文:做图表统计你需要掌握SQL Server 行转列和列转行说在前面做一个数据统计和分析的项目，每天面对着各种数据，经过存储过程从源表计算汇总后需要写入中间结果表以提高数据使用效率，那么此时就需要用到行转列和列转...

SQL Server：使用 PIVOT 行转列和 UNPIVOT 列转行

ylbtech-SQL Server：使用 PIVOT 行转列和 UNPIVOT 列转行可以使用 PIVOT 和 UNPIVOT 关系运算符将表值表达式更改为另一个表。PIVOT 通过将表达式某一列中的唯一值转换为输出中的多个列来旋转表值表达式，并在必要时对最终输出中所需的任何其余列值执行聚合。U...

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更新时间 2024-05-01 04:33:27

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