SUBSTRING ( expression , start , length ) Azure SQL Database、Azure SQL 受控實例、Azure Synapse Analytics、Analytics Platform System (PDW) 和 Microsoft Fabric 中的倉儲和 SQL 分析端點的語法。 syntaxsql 複製 SUBSTRING ( expression , start [ , length ] ) 引數 expression 字元、二進位、text、...
The MySQL SUBSTRING function provides the same functionality as MSSQL SUBSTRING function. i.e. it returns a part of the string. Here is the Syntax and Examples Syntax SUBSTRING(str,pos), SUBSTRING(str FROM pos), SUBSTRING(str,pos,len), SUBSTRING(str FROM pos FOR len) WHERE str Is the s...
5、起始位置为-9,截取长度为3 selectsubstring(DWMC,-9,3)asSub,DWMCasDWMCfromDWwhereDWNM='00010010' 1. 结果: 通过上面的例子,可以看出substring的截取,类似于X坐标上截取绝对长度,而对于字符串而言,负数及零的位置都是空,真正有数的位置是从1开始的!
SQL_FN_STR_SUBSTRING (ODBC 1.0)SQL_FN_STR_UCASE (ODBC 1.0)如果應用程式可以使用 string_exp1、string_exp2 和start 自變數呼叫 LOCATE 純量函式,驅動程式會傳回SQL_FN_STR_LOCATE位掩碼。 如果應用程式只能使用string_exp1和string_exp2自變數呼叫 LOCATE 純量函式,驅動程式會傳回SQL_FN_STR_LOCATE_2...
SELECTSUBSTRING('SQL Tutorial',1,3)ASExtractString; Try it Yourself » Definition and Usage The SUBSTRING() function extracts some characters from a string. Syntax SUBSTRING(string,start,length) Parameter Values ParameterDescription stringRequired. The string to extract from ...
Transact-SQL syntax conventions Syntax syntaxsql SUBSTRING( expression, start, length ) Arguments expression Is acharacter,binary,text,ntext, orimageexpression. start Is an integer orbigintexpression that specifies where the returned characters start. (The numbering is 1 based, meaning that the first...
Substring Replacement REGEXP_REPLACE(String1,String2,String3): Replaces occurrences in theString1value that match the regular expression specified byString2with theString3value and returns the resulting string. Example: select regexp_replace("Purchase", "Pu|ch", "tt") ...
l SUBSTRING() 以下这些函数与变量是非确定性的: l GETDATE() l @@ERROR l @@SERVICENAME l CURSORSTATUS() l RAND() 在函数中使用用户变量 变量既可用于输入,也可用于输出。在T-SQL中,用户变量以@符号开头,用于声明为特定的数据类型。可以使用SET或者SELECT语句给变量赋值。以下的例子用于将一个int类型的...
Syntax Másolás fn:substring($sourceString as xs:string?, $startingLoc as xs:decimal?) as xs:string? fn:substring($sourceString as xs:string?, $startingLoc as xs:decimal?, $length as xs:decimal?) as xs:string? Arguments $sourceString Source string. $startingLoc Starting point in the...
Syntax C++ Copy SQLRETURN SQLGetInfo( SQLHDBC ConnectionHandle, SQLUSMALLINT InfoType, SQLPOINTER InfoValuePtr, SQLSMALLINT BufferLength, SQLSMALLINT * StringLengthPtr); Arguments ConnectionHandle [Input] Connection handle. InfoType [Input] Type of information. InfoValuePtr [Output] Pointer to...