假设我们有一个包含URL的字符串,我们需要提取URL中的域名部分。例如,给定字符串'www.example.com`。 代码示例 首先,我们需要找到URL中第一个/的位置,然后使用SUBSTRING函数截取域名部分。 DECLARE@urlNVARCHAR(255)=' -- 找到第一个'/'的位置 DECLARE @slashPosition INT = CHARINDEX('/',@url);-- 使用SUBSTRI...
SQL Server是一种关系型数据库管理系统,它提供了一种称为SUBSTRING的函数,用于在字符串中分隔多条数据。SUBSTRING函数允许我们从字符串中提取部分内容,并在结果集中返回所需的数据。 在本文中,我们将探讨如何使用SQL Server的SUBSTRING函数来分隔多条数据,并提供一个完整的代码示例。 SUBSTRING函数 SUBSTRING函数用于从字...
The following example shows how to return only a part of a character string. From thedbo.DimEmployeetable, this query returns the last name in one column with only the first initial in the second column. SQL -- Uses AdventureWorksSELECTLastName,SUBSTRING(FirstName,1,1)ASInitialFROMdbo.DimEmp...
The following example shows how to return only a part of a character string. From the dbo.DimEmployee table, this query returns the last name in one column with only the first initial in the second column.SQL העתק -- Uses AdventureWorks SELECT LastName, SUBSTRING(FirstName, 1...
CHARINDEX函数用于查找子字符串在字符串中的位置,可以与SUBSTRING函数结合使用。例如,假设有一个字符串“John.Doe@example.com”,你需要提取用户名部分“John.Doe”,可以使用以下SQL语句: SELECT SUBSTRING('John.Doe@example.com', 1, CHARINDEX('@', 'John.Doe@example.com') - 1); ...
The following example shows how to return only a part of a character string. From thedbo.DimEmployeetable, this query returns the last name in one column with only the first initial in the second column. SQL -- Uses AdventureWorksSELECTLastName,SUBSTRING(FirstName,1,1)ASInitialFROMdbo.DimEmp...
SQL Server Import and Export Wizard Get started with this simple example of the Import and Export Wizard Start the SQL Server Import and Export Wizard Connect to Data Sources with the SQL Server Import and Export Wizard Steps in the SQL Server Import and Export Wizard Import from or export ...
SQL Copy SELECT x = SUBSTRING('abcdef', 2, 3); Here's the result set. Copy x --- bcd (1 row(s) affected) B. Using SUBSTRING with text, ntext, and image data Note To run the following examples, you must install the pubs database. The following example shows how to return...
Example Extract 100 characters from a string, starting in position 1: SELECT SUBSTRING('SQL Tutorial', 1, 100) AS ExtractString; Try it Yourself » ❮ Previous ❮ SQL Server Functions Next ❯ W3schools Pathfinder Track your progress - it's free! Log in Sign Up ...
---Example Uses of the SUBSTRING String Function --http://www.sql-server-helper.com/tips/tip-of-the-day.aspx?tkey=4AB06421-E859-4B5F-A948-0C9640F3108D&tkw=sample-uses-of-the-substring-string-function --取名字Usage #1 : Get the First Name and Last Name from a Full Name ...