Applies to:SQL Server This function converts each character in$argto its upper case equivalent. The Microsoft Windows binary case conversion for Unicode code points specifies how characters are converted to uppe
The fn:upper-case function converts a string to uppercase. Syntax fn:upper-case( source-string,locale-name) source-string The string that is to be converted to uppercase. source-string has the xs:string data type, or is an empty sequence. locale-name A string containing the locale to...
首先我们演示在显示时,才改写为大写,函数语法fn:upper-case(): SELECTD.l.value('fn:upper-case((/Devs/lang/@name)[3])','NVARCHAR(15)'), D.l.value('fn:upper-case((/Devs/lang/@name)[4])','NVARCHAR(15)') FROM@xml.nodes('/') D(l)--table(column) 执行结果: 上面即是在SELECT时改...
原因:对于大量数据的处理,使用UPPERCASE函数可能会导致性能瓶颈,因为它需要对每一行数据进行逐字符的检查和转换。 解决方法: 索引优化:如果经常需要对某个字段进行大写转换后的搜索,可以考虑在该字段上创建一个函数索引(Function-Based Index),将转换后的值存储在一个辅助列中,并对该列建立索引。
标签: SQL Server 收藏 XML有很多函数,如upper-case可以把某些值显示或改写为大写。比如下面这个xml类型变量中,第5行与第6行属性值是小写,现想把它显示来大写。 1 DECLARE @xml XML = '2 <Devs>3 <lang name="VB.NET"/>4 <lang name="C#.NET"/>5 <lang name="Java" />6 <lang name="...
T-SQL使用函数upper-case更新xml XML有很多函数,如upper-case可以把某些值显示或改写为大写。比如下面这个xml类型变量中,第5行与第6行属性值是小写,现想把它显示来大写。 1DECLARE@xmlXML=' 2<Devs> 3<lang name="VB.NET"/> 4<lang name="C#.NET"/>...
The SQL UPPER() function is used to convert all characters of a string to uppercase. Syntax: UPPER(string) PostgreSQL, MySQL, SQL Server and Oracle All of above platforms support the SQL syntax of UPPER(). Parameters: Visual Presentation: ...
Example Convert the text to upper-case: SELECT UPPER("SQL Tutorial is FUN!"); Try it Yourself » Definition and UsageThe UPPER() function converts a string to upper-case.Note: This function is equal to the UCASE() function.SyntaxUPPER(text)...
UPPER(string)Code language:SQL (Structured Query Language)(sql) Arguments# TheUPPER()function takes one argument: 1)string is the string which is converted to uppercase Return value# TheUPPER()function returns a string with all letters in uppercase. ...
CASE() case搜索函数 1SELECT*,CASE2WHEN分数>=90THEN'优'3WHEN分数>=80AND分数<90THEN'良'4WHEN分数>=60AND分数<80THEN'中'5WHEN分数>=0AND分数<60THEN'差'END6fromuser_03 简单case函数 1SELECT*,CASEgender2WHEN'man'THEN'男'3WHEN'woman'THEN'女'END4ASgenderFROMuser_02...