The SUBSTRING function is used to extract a part of a string. This function is available in both MS SQL Server and MySQL. The MySQL SUBSTRING function provides more functionality than MS SQL Server SUBSTRING function. In MySQL you can also use SUBSTR function which is Synonym for SUBSTRING fun...
首先,让我们从一个简单的示例开始,使用substring函数提取字符串中的一部分内容。假设我们有一个字符串“Hello, World!”,我们想要提取出其中的“World!”。我们可以使用substring函数来实现这个目标。下面是一个示例: sql SELECT SUBSTRING('Hello, World!', 8, 6) AS Result; 这条SQL语句将返回“World!”作为结...
截取conDate字段,从第一个字符开始截取,截取四个字符。 3、 sql函数subString(),charindex()联合使用: select * from contribution where convert(int,substring(conDate,charindex('-',conDate)+1,4))>2012 找到conDate段中"-"的位置,然后从该位置开始,截取4个字符串,然后转换为int,和2012比较大小。 ——— 版...
Without Feature F844, "SUBSTRING_REGEXP", conforming SQL language shall not contain <regex substring function>. Microsoft SQL Server 2008 R2 and Microsoft SQL Server 2012 vary as follows: Transact-SQLdoes not support this feature.
1. MSSQL中,下标从1开始,注意:不是大多数编程语言采用的0。 2. substring函数的调用substring(str,startIndex,length) 效果上是转换为substring(str,startIndex,endIndex)来运算的, endIndex=startIndex+length。 3. 对于区间取值,采取的是前闭后开的策略,也有是说包含开始下标,但是不包含结束下标。
SQL Server: SUBSTRING( ) SQL 中的 substring 函数是用来截取一个栏位资料中的其中一部分。 例如,我们需要将字符串'abdcsef'中的‘abd'给提取出来,则可用substring 来实现: select substring('abdcsef',1,3) 结果: 'abd' 括号中数字‘1'表示截取的起始位置是从该字符串第一个字符开始,‘3'表示截取后得到...
Applies to:SQL Server Returns part of the value of$sourceString, starting at the position indicated by the value of$startingLoc,and continues for the number of characters indicated by the value of$length. Syntax fn:substring($sourceString as xs:string?, $startingLoc as xs:decimal?) as xs:...
The substring() function retrieves the first 50 characters from the string value retrieved by the string(). This is a partial result: Salin ProductModelID Result --- --- 19 <Prod>Our top-of-the-line competition mountain bike.</Prod> 23 <Prod>Suitable for any type of riding, on or...
Returns part of a character, binary, text, or image expression. For more information about the valid SQL Server data types that can be used with this function, seeData Types (Transact-SQL). Transact-SQL Syntax Conventions Syntax SUBSTRING (value_expression ,start_expression ,length_expression )...
Transact-SQL reference for the SUBSTRING function. This function returns a portion of a specified character, binary, text, or image expression.