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...
单参数形式:str.substring(int beginIndex),从beginIndex开始到字符串末尾。例如,'example'.substring(3)返回mple。 双参数形式:str.substring(int beginIndex, int endIndex),包含beginIndex字符,不包含endIndex字符。例如,'example'.substring(2,5)返回amp。若参数越界会抛出IndexOutOfBoundsExceptio...
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...
SELECT SUBSTRING('John.Doe@example.com', 1, CHARINDEX('@', 'John.Doe@example.com') - 1); 这将返回“John.Doe”。 2. 与REPLACE函数结合使用: REPLACE函数用于替换字符串中的某些字符,可以与SUBSTRING函数结合使用。例如,假设有一个字符串“Hello, World!”并且你想将其中的“World”替换为“SQL”,可...
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。
❮Previous❮ SQL Server FunctionsNext❯ ExampleGet your own SQL Server Extract 3 characters from a string, starting in position 1: SELECTSUBSTRING('SQL Tutorial',1,3)ASExtractString; Try it Yourself » Definition and Usage The SUBSTRING() function extracts some characters from a string. ...
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...
SQL SELECTSUBSTRING('abcdef',2,3)ASx; Here's the result set. Output x --- bcd B. Use SUBSTRING with text, ntext, and image data Note To run the following examples, you must install thepubsdatabase. The following example shows how to return the first 10 characters from each of atext...
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...
---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 ...