Home Backend Development PHP Tutorial MySQL的Update的使用,该如何处理

MySQL的Update的使用,该如何处理

Jun 13, 2016 pm 01:39 PM
select tinyint update

MySQL的Update的使用
MySQL的更新语句update中可以用子查询吗?

 update score set 姓名='王五' where 总分=(select min(总分) from score);

我这样用为什么出错?

/*******************
CREATE TABLE IF NOT EXISTS score(
学号 BIGINT UNSIGNED,
姓名 varchar(10),
数学 TINYINT UNSIGNED,
英语 TINYINT UNSIGNED,
物理 TINYINT UNSIGNED,
计算机综合 TINYINT UNSIGNED,
总分 int UNSIGNED
);

已确保各字段数据正确插入
********************/


求教!

------解决方案--------------------
这样试试,

update score set …… where 总分 in ( SELECT * FROM (SELECT min(总分) AS 总分 FROM score)t)
------解决方案--------------------

SQL code
 update score set 姓名='王五' order by 总分 asc limit 1;
<br><font color="#e78608">------解决方案--------------------</font><br>
mysql中 update的表 不能出现在第一层的子查询中,参考4楼的方法让表绕过第一层子查询
<br><font color="#e78608">------解决方案--------------------</font><br>试一下不就知道了<br>
Copy after login
SQL code
UPDATE score  SET 数学=(SELECT 数学 FROM (SELECT MIN(数学) AS 数学 FROM score )t)-4 WHERE 姓名='王五'; <div class="clear">
                 
              
              
        
            </div>
Copy after login
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)
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
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)

Fix: Google Chrome update check failed with error code 3: 0x80040154 Fix: Google Chrome update check failed with error code 3: 0x80040154 Apr 13, 2023 pm 05:46 PM

Google Chrome is one of the most popular browsers in the world and many users prefer to use it as the default browser on their Windows PCs. Chrome offers a wide range of features that make the browsing experience enjoyable and effortless, and therefore, it remains one of the most trusted browsers. But just like any other browser, even Chrome has its own shortcomings, and it's equally prone to bugs and glitches when you need it most. One such error is Error Code 3: 0x80040154, which occurs while checking for Google Chrome updates. The error message reads "An error occurred while checking for updates. The update check failed to start (Error code 3: 0x80080005) or (Error

What is the difference between Mysql tinyint(1) and tinyint(4) What is the difference between Mysql tinyint(1) and tinyint(4) Jun 01, 2023 am 08:31 AM

What is tinyint(M)? First, let’s understand the difference between the string type varchar(M) and the numerical type tinyint(M) in mysql? For string column type: varchar(M), M is the maximum character length that can be stored in the field, which is the field length. Depending on the settings, you are likely to receive an error when you insert data that exceeds the field length, and even if you do not receive an error, the data you insert will be automatically truncated to fit the predefined length of the field. Therefore, varchar(20) and varchar(40) are different, which truly reflects the length of data that can be stored in this field. Numeric column type: Its length modifier indicates the maximum display width, which is the same as the field

How to enable/disable VS Code automatic updates How to enable/disable VS Code automatic updates Apr 28, 2023 am 09:28 AM

If you are using Visual Studio Code (VSCode) and thinking about how to disable its automatic software updates and how to disable the automatic updates of its extensions, then read this article. If you don't use VSCode often, open the editor after a long period of time and want to enable automatic updates, this article will also guide you in doing so. Let us discuss in detail the different ways to enable or disable VSCode automatic updates. Table of Contents Method One: Use Settings to Enable/Disable VSCode Automatic Updates Step 1: Open VS Code and click the gear-shaped symbol in the lower left corner. Step 2: Click Settings in the list that appears. Step 3: Type update in the search bar and hit enter. Find Updates: Pattern 4

KDE Plasma 6.1 brings many enhancements to the popular Linux desktop KDE Plasma 6.1 brings many enhancements to the popular Linux desktop Jun 23, 2024 am 07:54 AM

After several pre-releases, the KDE Plasma development team unveiled version 6.0 of its desktop environment for Linux and BSD systems on 28 February, using the Qt6 framework for the first time. KDE Plasma 6.1 now comes with a number of new features t

Solution to high CPU usage of Microsoft compatibility telemetry Solution to high CPU usage of Microsoft compatibility telemetry Mar 16, 2024 pm 10:16 PM

When we use the win10 system, we sometimes encounter situations where the computer becomes stuck. Then when we check the background process, we find that a Microsoftcompatibilitytelemetry process takes up a particularly high amount of resources. So what is going on? Users can try to uninstall the third-party protection software and then try a clean boot to operate. Let this site carefully introduce to users the solution to the high CPU usage of Microsoftcompatibilitytelemetry. Solution to the high CPU usage of Microsoftcompatibilitytelemetry Method 1: Try after uninstalling the third-party protection software

Asynchronous processing method of Select Channels Go concurrent programming using golang Asynchronous processing method of Select Channels Go concurrent programming using golang Sep 28, 2023 pm 05:27 PM

Asynchronous processing method of SelectChannelsGo concurrent programming using golang Introduction: Concurrent programming is an important area in modern software development, which can effectively improve the performance and responsiveness of applications. In the Go language, concurrent programming can be implemented simply and efficiently using Channels and Select statements. This article will introduce how to use golang for asynchronous processing methods of SelectChannelsGo concurrent programming, and provide specific

How to hide the select element in jquery How to hide the select element in jquery Aug 15, 2023 pm 01:56 PM

How to hide the select element in jquery: 1. hide() method, introduce the jQuery library into the HTML page, you can use different selectors to hide the select element, the ID selector replaces the selectId with the ID of the select element you actually use; 2. css() method, use the ID selector to select the select element that needs to be hidden, use the css() method to set the display attribute to none, and replace selectId with the ID of the select element.

How to use UPDATE statement in SQL How to use UPDATE statement in SQL Jun 02, 2023 pm 09:13 PM

SQLUPDATE statement The Update statement is used to modify the data in the table. The syntax is as follows: UPDATE table name SET column name = new value WHERE column name = certain value "Person" table: LastNameFirstNameAddressCityGatesBillXuanwumen10BeijingWilsonChamps-Elysees Update a column in a certain row UPDATEPerson SETFirstName="Fred" WHERELastName="Wilson" Result: LastNa

See all articles