WITH XMLNAMESPACES ('https://schemas.microsoft.com/sqlserver/2004/07/adventure-works/ProductModelDescription' as pd) SELECT CatalogDescription.query(' <Prod ProductID= "{ /pd:ProductDescription[1]/@ProductModelID }" > <LongSummary SummaryLength = "{string-length(string( (/pd:ProductDescription/...
fn:string-length() as xs:integer fn:string-length($arg as xs:string?) as xs:integer 参数 $arg 要计算其长度的源字符串。 注解 如果$arg的值是空序列,则返回 xs:integer值 0。 XQuery 函数中代理对的行为依赖于数据库兼容级别。 如果该兼容级别为 110 或更高,则每个代理对都作为单个字符计数。 对于...
SQL>select Last_Name, length(Last_Name) from customer order by LastName; 2.使用SUBSTR函数从字符串中提取子串 语法: SUBSTR函数的语法如下: SUBSTR(string, string charcter, number of charcters) 变量定义如下: string为字符列或字符串表达式 string charcter为子串的起始位置 ...
CREATEORREPLACEFUNCTIONget_max_department_bit_lengthRETURNNUMBERASv_max_length NUMBER :=0;v_bit_length NUMBER;BEGINFORdeptIN(SELECTdepartment_nameFROMdepartments)LOOPv_bit_length :=LENGTHB(dept.department_name)*8;-- Multiply by 8 to get the number of bitsIFv_bit_length>v_max_lengthTHENv_max_...
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.RemarksIf the value of $arg is an empty sequence, an xs:integer value of 0 is returned.The...
Functions on String Values - concat Functions on String Values - contains Functions on String Values - substring Functions on String Values - string-length Functions on String Values - lower-case Functions on String Values - upper-case Numeric Values Functions - ceiling ...
The CHAR_LENGTH function (also known as the CHARACTER_LENGTH function) returns the number of characters in a quoted string, column with a character data type, host variable, or procedure variable. However, the actual behavior of this function varies with the type of argument that the user spec...
---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 ...
length:是一个整数,指定子串的长度(要返回的字符数或字节数)。 返回类型: 1)、如果expression是支持的字符数据类型,则返回字符数据。 2)、如果expression是支持的binary数据类型,则返回二进制数据。 返回字符串的类型与给定表达式的类型相同(表中显示的除外)。
string_expression 要计算的字符串表达式。 返回类型 int 示例 下面的示例选定字符个数是求籍贯是北京的姓名及姓名所占的长度。 Select len(姓名),姓名 from yuangong where 籍贯=’北京’ declare @abc varchar(10) set @abc='abc ' select len(@abc) ...