Applies to: SQL ServerReturns the length of the string in characters.Syntaxنسخ fn:string-length() as xs:integer fn:string-length($arg as xs:string?) as xs:integer Arguments$arg Source string whose length is to be computed.Remarks...
Applies to: SQL ServerReturns the length of the string in characters.SyntaxKopyala fn:string-length() as xs:integer fn:string-length($arg as xs:string?) as xs:integer Arguments$arg Source string whose length is to be computed.Remarks...
SQL Server 2016 及以上版本引入了 STRING_SPLIT 函数,它可以将一个字符串按照指定的分隔符进行切割,并返回一个表格。 STRING_SPLIT 函数的语法如下: STRING_SPLIT(string,separator) 1. string:要切割的字符串。 separator:分隔符。 下面是一个示例,展示如何使用 STRING_SPLIT 函数切割字符串: DECLARE@strVARCHAR(...
8) SUBSTRING() 语法:SUBSTRING(expression, start, length) 描述:返回 SQL Server 中的字符、二进制、文本或图像表达式的一部分。 示例:SELECTSUBSTRING('截取子字符串',, 1) AS Column1, SUBSTRING('截取子字符串',, 4) AS Column1, SUBSTRING('截取子字符串',, 3) AS Column1; 结果: 9) UPPER() ...
1) SQL Server:asc正序 SELECTTOP 1column/*FROMtable_nameORDER BYcolumn_nameASC; 2) MYSQL: SELECTcolumnFROMtable_nameORDER BYcolumn_nameASCLIMIT 1; 3) ORACLE: SELECTcolumnFROMtableORDER BYcolumnASCWHERE ROWNUM <=1; 4) MS Access: SELECTFIRST(column_name) FROM table_name; ...
适用范围:SQL Server 返回表示为字符串的$arg的值。 语法 fn:string() as xs:string fn:string($arg as item()?) as xs:string 参数 $arg 一个节点或原子值。 注解 如果$arg为空序列,则返回零长度字符串。 如果$arg是节点,则函数将返回使用字符串值访问器获取的节点的字符串值。 W3C XQuery 1.0 和 ...
SELECT Function() 一个论点 对于SQL函数而言,参数表示输入变量或者值的占位符。函数可以有任意个参数,有些参数是必须的,而有些参数是可选的。可选参数通常被置于以逗号隔开的参数表的末尾,以便于在函数调用中去除不需要的参数。 在SQL Server在线图书或者在线帮助系统中,函数的可选参数用方括号表示。在下列的CONVER...
❮Previous❮ SQL Server FunctionsNext❯ ExampleGet your own SQL Server Return a number as a string: SELECTSTR(185); Try it Yourself » Definition and Usage The STR() function returns a number as a string. Syntax STR(number,length,decimals) ...
适用范围:SQL Server 返回$sourceString值的一部分,从$startingLoc值指示的位置开始,并继续$length值指示的字符数。 语法 fn:substring($sourceString as xs:string?, $startingLoc as xs:decimal?) as xs:string? fn:substring($sourceString as xs:string?, $startingLoc as xs:decimal?, $length as xs:de...
Applies to:SQL Server Returns part of the value of$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:...