如何在SQL Server中使用数据透视表（无聚合）？ [英] How to use pivot in sql server (without aggregates )?

问题描述

请帮助我解决此问题：
您将得到一个包含两列的表：
列是以下内容之一：

please help me solve this problem: You are given a table, containing two columns: column is one of the followings:

Doctor
Professor
Singer
Actor

编写查询以在相应的occ下输出名称。格式如下：

Write a query to output the names underneath the corresponding occ. in the following format:

+--------+-----------+--------+------+

| Doctor | Professor | Singer | Actor|

+--------+-----------+--------+------+

名称必须按字母顺序排列。

Names must be listed in alphabetically sorted order.

样本输入

Name        Occupation
Meera       Singer
Ashely      Professor
Ketty       Professor
Christeen   Professor
Jane        Actor
Jenny       Doctor
Priya       Singer    

样本输出

Jenny    Ashley     Meera  Jane

Samantha Christeen  Priya  Julia

NULL     Ketty      NULL   Maria

注意

打印 NULL

我尝试使用：

SELECT *
FROM
(
SELECT [Name], [Occupation] 
FROM occupations 
) AS source
PIVOT
(
    max([Name])
    FOR [occupation] IN ([Doctor], [Professor], [Singer], [Actor]) 
) as pvt;

给出以下输出：

Priya Priyanka Kristeen Samantha 

如何解决？

推荐答案

您只需要根据名称的职业和字母顺序给每个名称指定一个行号即可。然后将该行号包括在数据透视查询中

You just need to give each name a row number based on their occupation and order alphabetically.. then include that row number in your pivot query.

CREATE TABLE Occupations (
     NAME VARCHAR(MAX),
     Occupation VARCHAR(MAX)
    )
INSERT  INTO Occupations
VALUES
        ('Samantha','Doctor'),
        ('Julia','Actor'),
        ('Maria','Actor'),
        ('Meera','Singer'),
        ('Ashley','Professor'),
        ('Ketty','Professor'),
        ('Christeen','Professor'),
        ('Jane','Actor'),
        ('Jenny','Doctor'),
        ('Priya','Singer');

SELECT
    [Doctor],
    [Professor],
    [Singer],
    [Actor]
FROM
    (SELECT 
         ROW_NUMBER() OVER (PARTITION BY Occupation ORDER BY Name) rn,
         [Name],
         [Occupation] 
     FROM 
         Occupations
    ) AS source 
PIVOT
    ( MAX([Name]) FOR [occupation] IN ([Doctor],[Professor],[Singer],[Actor]) ) as pvt
ORDER BY rn


DROP TABLE Occupations

这篇关于如何在SQL Server中使用数据透视表（无聚合）？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！