search
HomeBackend DevelopmentPHP TutorialAn explanation of the SQL LIKE operator
An explanation of the SQL LIKE operatorMay 08, 2018 am 09:53 AM
likesqlOperator

SQL LIKE is very important to php, so this article will explain it

LIKE Operator

The LIKE operator is used to search a specified pattern in a column in the WHERE clause.

SQL LIKE operator syntax

SELECT column_name(s)
FROM table_name
WHERE column_name LIKE pattern

LIKE operator example

Example 1

Now, we want to select residence from the "Persons" table above People in cities starting with "N":

We can use the following SELECT statement:

SELECT * FROM Persons
WHERE City LIKE 'N%'

Tip: "%" can be used to define the wildcard character (pattern missing letters).

Example 2

Next, we want to select people from the "Persons" table who live in cities ending with "g":

We can use the following SELECT statement:

SELECT * FROM Persons
WHERE City LIKE '%g'

Result set:

Example 3

Next, we want to select people living in cities containing "lon" from the "Persons" table :

We can use the following SELECT statement:

SELECT * FROM Persons
WHERE City LIKE '%lon%'

Example 4

By using the NOT keyword, we can select from the "Persons" table living in a country that does not contain " lon" people in the city:

We can use the following SELECT statement:

SELECT * FROM Persons
WHERE City NOT LIKE '%lon%'

This article provides a relevant explanation of SQL LIKE. For more learning materials, please pay attention to php Chinese You can watch it online.

Related recommendations:

Explanation on the SQL TOP clause

About the analysis of the SQL SELECT DISTINCT statement

Related knowledge about SQL SELECT statement

The above is the detailed content of An explanation of the SQL LIKE operator. For more information, please follow other related articles on the PHP Chinese website!

Statement
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
SQL Server使用CROSS APPLY与OUTER APPLY实现连接查询SQL Server使用CROSS APPLY与OUTER APPLY实现连接查询Aug 26, 2022 pm 02:07 PM

本篇文章给大家带来了关于SQL的相关知识,其中主要介绍了SQL Server使用CROSS APPLY与OUTER APPLY实现连接查询的方法,文中通过示例代码介绍的非常详细,下面一起来看一下,希望对大家有帮助。

SQL Server解析/操作Json格式字段数据的方法实例SQL Server解析/操作Json格式字段数据的方法实例Aug 29, 2022 pm 12:00 PM

本篇文章给大家带来了关于SQL server的相关知识,其中主要介绍了SQL SERVER没有自带的解析json函数,需要自建一个函数(表值函数),下面介绍关于SQL Server解析/操作Json格式字段数据的相关资料,希望对大家有帮助。

聊聊优化sql中order By语句的方法聊聊优化sql中order By语句的方法Sep 27, 2022 pm 01:45 PM

如何优化sql中的orderBy语句?下面本篇文章给大家介绍一下优化sql中orderBy语句的方法,具有很好的参考价值,希望对大家有所帮助。

Monaco Editor如何实现SQL和Java代码提示?Monaco Editor如何实现SQL和Java代码提示?May 07, 2023 pm 10:13 PM

monacoeditor创建//创建和设置值if(!this.monacoEditor){this.monacoEditor=monaco.editor.create(this._node,{value:value||code,language:language,...options});this.monacoEditor.onDidChangeModelContent(e=>{constvalue=this.monacoEditor.getValue();//使value和其值保持一致i

一文搞懂SQL中的开窗函数一文搞懂SQL中的开窗函数Sep 02, 2022 pm 04:55 PM

本篇文章给大家带来了关于SQL server的相关知识,开窗函数也叫分析函数有两类,一类是聚合开窗函数,一类是排序开窗函数,下面这篇文章主要给大家介绍了关于SQL中开窗函数的相关资料,文中通过实例代码介绍的非常详细,需要的朋友可以参考下。

如何使用exp进行SQL报错注入如何使用exp进行SQL报错注入May 12, 2023 am 10:16 AM

0x01前言概述小编又在MySQL中发现了一个Double型数据溢出。当我们拿到MySQL里的函数时,小编比较感兴趣的是其中的数学函数,它们也应该包含一些数据类型来保存数值。所以小编就跑去测试看哪些函数会出现溢出错误。然后小编发现,当传递一个大于709的值时,函数exp()就会引起一个溢出错误。mysql>selectexp(709);+-----------------------+|exp(709)|+-----------------------+|8.218407461554972

Monaco Editor怎么实现SQL和Java代码提示Monaco Editor怎么实现SQL和Java代码提示May 11, 2023 pm 05:31 PM

monacoeditor创建//创建和设置值if(!this.monacoEditor){this.monacoEditor=monaco.editor.create(this._node,{value:value||code,language:language,...options});this.monacoEditor.onDidChangeModelContent(e=>{constvalue=this.monacoEditor.getValue();//使value和其值保持一致i

如何在Python中根据运行时修改业务SQL代码?如何在Python中根据运行时修改业务SQL代码?May 08, 2023 pm 02:22 PM

1.缘起最近项目在准备搞SASS化,SASS化有一个特点就是多租户,且每个租户之间的数据都要隔离,对于数据库的隔离方案常见的有数据库隔离,表隔离,字段隔离,目前我只用到表隔离和字段隔离(数据库隔离的原理也是差不多)。对于字段隔离比较简单,就是查询条件不同而已,比如像下面的SQL查询:SELECT*FROMt_demoWHEREtenant_id='xxx'ANDis_del=0但是为了严谨,需求上需要在执行SQL之前检查对应的表是否带上tenant_id的查询字段

See all articles

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 agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version