oracle xml parser

In fact, the XML string is like an external table in Oracle, so Oracle has some rules for parsing XML strings that are very demanding. The data provided by the XML string is a table, so Oracle must provide a column header that is

Label:Today there is a problem with the operation of XML format data in Oracle.Problem record: The requirement is clear that the field type is XmlType, to do is to resolve the field, but because of the database designer's problem, some tables in the field type is designed as CLOB type.Workaround:XmlType type parsing is easy: using the Extractvalue function, you can use:select column_name1,column_name2,extractvalue(column_name3,‘/nodeName1/nodeName2/no

Today, I accidentally found that Oracle could use SQL to parse XML files, so I checked some information with curiosity.List the examples for interested colleagues. Select * from xmltable ('$ B/Person/Student' passing --- specify the root node hereXmltype ('') As BColumns --- specify the column nameName varchar2 (32) path '/Student/name ',Sex varchar2 (4) path '/Student/sex ',Age number (10) path '/Student/a

Server login String userpwd=" password ";//password replace with your SQL Server login password try { Class.forName (drivername); Connection dbconn=drivermanager.getconnection (dburl,username,userpwd); SYSTEM.OUT.PRINTLN ("Connection database succeeded"); } catch (Exception e) { System.out.print ("Connection Failed"); } } } Connect to MySQL Database Package test_mysql; Import java.sql.Connection; Import Java.sql.DriverManager; public class Testmysql {public

. 2.substr SUBSTR (string, intercept start position, intercept length)//return intercepted word substr (' Hello World ', 0, 1)//return result is ' H ' * start with a string of length 1 from the first character substr (' Hello World ', 1, 1)//Returns the result for ' H ' *0 and 1 is the first character that represents the start position of the Intercept substr (' Hello world ', 2,4)//return result as ' Ello ' substr (' Hello world ', -3,3)//Returns the result as ' rld ' * negative (-