Home Database Mysql Tutorial oracle 列转行

oracle 列转行

Jun 07, 2016 pm 03:26 PM
oracle test New Add to in the table

1.新建一个名为TEST表 2.向TEST表中添加数据 INSERT INTO TEST(STUDENT,COURSE,SCORE) select '张三','语文',78 from dual union select '张三','数学',87 from dual union select '张三','英语',82 from dual union select '张三','物理',90 from dual unio

1.新建一个名为TEST表

2.向TEST表中添加数据

INSERT INTO TEST(STUDENT,COURSE,SCORE)
select '张三','语文',78 from dual union
select '张三','数学',87 from dual union 
select '张三','英语',82 from dual union
select '张三','物理',90 from dual union
select '李四','语文',65 from dual union
select '李四','数学',77 from dual union
select '李四','英语',65 from dual union
select '李四','物理',85 from dual

表数据如下:

oracle 列转行

3.列转行

方法··1:

select 
    Student,
    sum(decode(Course, '数学', Score)) 数学,
    sum(decode(Course, '物理', Score)) 物理,
    sum(decode(Course, '英语', Score)) 英语,
    sum(decode(Course, '语文', Score)) 语文
from 
    TEST 
group by Student

方法··2:

select
    Student,
    sum(case Course when '数学' then Score else null end) 数学,
    sum(case Course when '物理' then Score else null end) 物理,
    sum(case Course when '英语' then Score else null end) 英语,
    sum(case Course when '语文' then Score else null end) 语文
from 
    TEST 
group by Student

效果如下:

oracle 列转行


注:sum是求和的意思;比如说里面记录里面有两条张三,列转行显示的结果就会是两个张三的结果之和。

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Two Point Museum: All Exhibits And Where To Find Them
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Huawei Watch GT 5 smartwatch gets update with new features Huawei Watch GT 5 smartwatch gets update with new features Oct 03, 2024 am 06:25 AM

Huawei is rolling out software version 5.0.0.100(C00M01) for the Watch GT 5 and the Watch GT 5 Prosmartwatchesglobally. These two smartwatches recently launched in Europe, with the standard model arriving as the company’s cheapest model. This Harmony

Tekken\'s Colonel Sanders dream fried by KFC Tekken\'s Colonel Sanders dream fried by KFC Oct 02, 2024 am 06:07 AM

Katsuhiro Harada, the Tekken series director, once seriously tried to bring Colonel Sanders into the iconic fighting game. In an interview with TheGamer, Harada revealed that he pitched the idea to KFC Japan, hoping to add the fast-food legend as a g

First look: Leaked unboxing video of upcoming Anker Zolo 4-port 140W wall charger with display First look: Leaked unboxing video of upcoming Anker Zolo 4-port 140W wall charger with display Oct 01, 2024 am 06:32 AM

Earlier in September 2024, Anker's Zolo 140W charger was leaked, and it was a big deal since it was the first-ever wall charger with a display from the company. Now, a new unboxing video from Xiao Li TV on YouTube gives us a first-hand look at the hi

New Xiaomi Mijia Graphene Oil Heater with HyperOS arrives New Xiaomi Mijia Graphene Oil Heater with HyperOS arrives Oct 02, 2024 pm 09:02 PM

Xiaomi will shortly launch the Mijia Graphene Oil Heater in China. The company recently ran a successful crowdfunding campaign for the smart home product, hosted on its Youpin platform. According to the page, the device has already started to ship to

Garmin releases Adventure Racing activity improvements for multiple smartwatches via new update Garmin releases Adventure Racing activity improvements for multiple smartwatches via new update Oct 01, 2024 am 06:40 AM

Garmin is ending the month with a new set of stable updates for its latest high-end smartwatches. To recap, the company released System Software 11.64 to combat high battery drain across the Enduro 3, Fenix E and Fenix 8 (curr. $1,099.99 on Amazon).

Redstone/RED currency listing price forecast and detailed explanation of token economics Redstone/RED currency listing price forecast and detailed explanation of token economics Mar 03, 2025 pm 10:42 PM

This time, the Redstone token $RED will be launched on Binance Launchpool on Binance TGE! This is also the first time Binance has launched a pre-market trading limit mechanism! The first day limit is 200%, and the ban will be lifted after 3 days to avoid "the peak will be achieved when the market opens"! Launchpool mechanism introduces the BinanceLaunchpool participating in Redstone that needs to pledge designated tokens (BNB, USDC, FDUSD) activity period is 48 hours: 08:00 UTC on February 26, 2025 to 08:00 UTC on February 28, 2025 ending this pre-market daily limit rule: 18:00 on February 28, 2025

How many RED tokens can you get when participating in Redstone (RED) airdrops? How many RED tokens can you get when participating in Redstone (RED) airdrops? Mar 04, 2025 pm 05:48 PM

Redstone (RED) airdrop activity is in full swing, attracting many investors to participate. Redstone is an advanced cross-chain data oracle, with a strong validator network, real-time data integration capabilities, and community incentive mechanisms, and has been supported by many well-known investment institutions. Its unique technological advantages make it stand out in the highly competitive oracle market and has huge potential for future development. This article will conduct in-depth analysis of the Redstone project, explore the number of RED tokens available for participating in airdrops, and make an outlook on the price of RED tokens, helping investors better understand and evaluate the Redstone project and investment risks. Especially for BNB holders, participating in airdrops will have the opportunity to obtain RED tokens and enrich the digital asset group

Manjaro 24.1 \'Xahea\' launches with KDE Plasma 6.1.5, VirtualBox 7.1, and more Manjaro 24.1 \'Xahea\' launches with KDE Plasma 6.1.5, VirtualBox 7.1, and more Oct 02, 2024 am 06:06 AM

With a history of over one decade, Manjaro is regarded as one of the most user-friendly Linux distros suitable for both beginners and power users, being easy to install and use. Mostly developed in Austria, Germany, and France, this Arch-based distro

See all articles