object of ResultSetMetaData:
The getMetaData() method of ResultSet interface returns proceeds the entity of ResultSetMetaData
Syntax: |
public ResultSetMetaData getMetaData()throws SQLException
DatabaseMetaData:
DatabaseMetaData interface gives techniques to get meta information of a database, for example, database item name, database item form, driver name, name of aggregate number of tables, name of aggregate number of perspectives and so forth.
Methods of DatabaseMetaData:- public String getDriverName()throws SQLException
- public String getDriverVersion()throws SQLException
- public String getUserName()throws SQLException
- public String getDatabaseProductName()throws SQLException
- public String getDatabaseProductVersion()throws SQLException
- public ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern, String[] types)throws SQLException
Object of DatabaseMetaData:
The getMetaData() method of link line returns the object of DatabaseMetaData.Syntax:public DatabaseMetaData getMetaData()throws SQLExceptionExample:import java.sql.*;
class Dbmd2{
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
public static void main(String args[]){
Connection con=DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521:xe","system","oracle");
DatabaseMetaData dbmd=con.getMetaData();
String table[]={"TABLE"};
ResultSet rs=dbmd.getTables(null,null,null,table);
while(rs.next()){
System.out.println(rs.getString(3));
} con.close();
}catch(Exception e){ System.out.println(e);}
}
}
Transaction Management:
Exchange speaks to a solitary unit of work. The ACID properties depicts the exchange administration well. Corrosive stands for Atomicity, Consistency, confinement and toughness.
Atomic implies either all effective or none. Consistency guarantees bringing the database starting with one reliable state then onto the next predictable state. Confinement guarantees that exchange is disconnected from other exchange. Toughness implies once an exchange has been conferred, it will remain along these lines, even in case of blunders, control misfortune and so on.
Methods:
void setAutoCommit(boolean status)
void rollback()
void commit()