在SQL Server中,行转列(Pivot)是一种常见的操作,它允许我们将行数据转换为列数据。这在某些场景下非常有用,比如将某个表中的多个行转换为多个列,或者将多个列转换为多个行。本文将介绍如何在SQL Server中使用动态行转列(Dynamic Pivot)。 行转列基础 在介绍动态行转列之前,我们首先来了解一下基本的行转列操作。
Dynamic PIVOT A disadvantage of the PIVOT operator is that its IN clause only accepts a static list of spreading values. It does not support e.g a sub-query as input. This means that we need to know in advance all the distinct values in the spreading element. The “hard coding” may ...
PIVOT在行转列的时候经常用到,最便捷的方式就是通过示例来理解它的作用。 示例1 Query to Return Select Product Data from AdventureWorks View Code 结果: 如果我们想要product_coor 在列里面显示每个产品的数量呢?这时候PIVOT就出场了 示例2:Common Use of PIVOT to Report on Products by Color View Code 结果...
So, again why would we ever want to use Dynamic SQL? One reason would be the automation of administrative tasks. Let’s say you have a non-production server with every limited space and you want to make sure that all the databases on your server are in simple recovery mode (to minimize...
Create view dynamic pivot create view from stored procedure Create view with NOLOCK CREATE VIEW WITH PRIMARY KEY CREATE/ALTER PROCEDURE' must be the first statement in a query batch. Create/Alter view with declare variable Created a new column in a select statement .How to use that column nam...
inMSDN Transact-SQL forum. Many times the problem of creating a dynamic pivot comes into the light. One thing that many people who ask this question forget is that such transposing is much easier to perform on the client side than on the server where we need to resort to dynamic qu...
That’s how you can do a pivot table in SQL Server. You can change the columns and rows to use by changing your query, but we’ve seen the general structure here. Dynamic PIVOT Columns In the earlier example, we generated a pivot table. However, we needed to specify each of the colu...
SQL Server requires you to specify explicitly the list of values in the IN clause to rotate to result columns. You can't use a static query and have SQL Server figure out all distinct values in OrderYear. To achieve this, you have to use dynamic execution to construct the query string ...
Learn how to create pivot tables in SQL Server with our guided examples. See how it's easier to use SQL and Excel together.
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