MySQL 去掉字段中的换行和回车符
MySQL 去除字段中的换行和回车符 解决方法: ????????? UPDATE tablename SET field = REPLACE(REPLACE(field, CHAR(10), ''), CHAR(13), ''); ????????? char(10):? 换行符 ????????? char(13):? 回车符 MySQL的trim函数没办法去掉回车和换行,只能去掉多余
MySQL 去除字段中的换行和回车符解决方法:
????????? UPDATE tablename SET field = REPLACE(REPLACE(field, CHAR(10), ''), CHAR(13), '');
????????? char(10):? 换行符
????????? char(13):? 回车符
MySQL的trim函数没办法去掉回车和换行,只能去掉多余的空格,可以用MySQL的replace函数,解决掉这个问题,具体解决办法如下:
假设想要审核数据库中内容为“我爱你?
”的短信息(注意内容后有换行)通过(status改变成1)?
之前的SQL语句是不起作用的?
UPDATE `tran`?
SET `status` = '1'?
WHERE `msg` = '我爱你';
修改之后的语句? UPDATE `tran`?
SET `status` = '1'?
WHERE trim( replace( `msg`, '\r\n', ' ' ) ) = '我爱你';
把数据中的回车换行等替换成空格之后再trim掉,就达到目的了,虽然不是特别完美,但是由于没办法在用户录入的时候控制,所以只能出此下策,好在MySQL内置函数的效率还是很有保证的。?
UPDATE `tran`?
SET `status` = '1'?
WHERE trim( trim(?
BOTH '\r\n'?
FROM content ) ) = '我爱你'
用了两个trim,这样的好处是不会替换内容中间的换行和回车,只会处理头尾的空格换行回车,相当于php中trim函数的作用了。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



MySQL is suitable for beginners because it is simple to install, powerful and easy to manage data. 1. Simple installation and configuration, suitable for a variety of operating systems. 2. Support basic operations such as creating databases and tables, inserting, querying, updating and deleting data. 3. Provide advanced functions such as JOIN operations and subqueries. 4. Performance can be improved through indexing, query optimization and table partitioning. 5. Support backup, recovery and security measures to ensure data security and consistency.

Navicat itself does not store the database password, and can only retrieve the encrypted password. Solution: 1. Check the password manager; 2. Check Navicat's "Remember Password" function; 3. Reset the database password; 4. Contact the database administrator.

Create a database using Navicat Premium: Connect to the database server and enter the connection parameters. Right-click on the server and select Create Database. Enter the name of the new database and the specified character set and collation. Connect to the new database and create the table in the Object Browser. Right-click on the table and select Insert Data to insert the data.

Navicat for MariaDB cannot view the database password directly because the password is stored in encrypted form. To ensure the database security, there are three ways to reset your password: reset your password through Navicat and set a complex password. View the configuration file (not recommended, high risk). Use system command line tools (not recommended, you need to be proficient in command line tools).

MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.

Steps to perform SQL in Navicat: Connect to the database. Create a SQL Editor window. Write SQL queries or scripts. Click the Run button to execute a query or script. View the results (if the query is executed).

You can create a new MySQL connection in Navicat by following the steps: Open the application and select New Connection (Ctrl N). Select "MySQL" as the connection type. Enter the hostname/IP address, port, username, and password. (Optional) Configure advanced options. Save the connection and enter the connection name.

Common reasons why Navicat cannot connect to the database and its solutions: 1. Check the server's running status; 2. Check the connection information; 3. Adjust the firewall settings; 4. Configure remote access; 5. Troubleshoot network problems; 6. Check permissions; 7. Ensure version compatibility; 8. Troubleshoot other possibilities.
