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 fu
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...
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...
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.
mssql,charindex,substring,split,分割,函数 createfunctionfsplit(@strvarchar(8000)) returns@tbtable(chvarchar(8000)) as begin declare@iint set@str=@str+',' set@i=charindex(',',@str) while@i>0 begin insertinto@tbvalues(left(@str,@i-1))...
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...
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...
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:...
REVERSE (Transact-SQL) RIGHT (Transact-SQL) RTRIM (Transact-SQL) SOUNDEX (Transact-SQL) SPACE (Transact-SQL) STR (Transact-SQL) STUFF (Transact-SQL) SUBSTRING (Transact-SQL) UNICODE (Transact-SQL) UPPER (Transact-SQL) System Functions (Transact-SQL) System Statistical Functions (Transact-SQL)...
CREATE FUNCTION dbo.check_number ( /*验证一字符串类型是否为整型数值类型*/ @checkTmp VARCHAR(100) ) RETURNS BIT BEGIN DECLARE @tmp BIT IF LEFT(@checkTmp, 1) = '-' SET @checkTmp = SUBSTRING(@checkTmp, 2, LEN(@checkTmp)) IF (PATINDEX('%[^0-9-]%', @checkTmp) = 0 ...