{

Environment *env; Connection *conn; Statement *stmt; ResultSet *rs;

string username = “ipd”; string password = “ipd”; string connstring = “ora9i”; string sql,strname; int isno;

env = Environment::createEnvironment(); //创建一个环境变量

conn = env->createConnection(username,password,connstring); //创建一个数据库连接对象 stmt = conn->createStatement(); //创建一个Statement对象

sql = “ SELECT sno,sname FROM student “; //拼接一个SQL语句 stmt->setSQL(sql); //设置SQL语句到Statement对象中 try { rs = stmt->executeQuery();//执行SQL语句 while (rs->next()) { //用循环，一条一条地取得查询的结果记录 isno = rs->getInt(1);//取出第一列的值（对应为int型） strname=rs->getString(2); //取出第二列的值（对应为string型） cout << isno << “ AND “ << strname << endl; } cout << “SELECT ―― SUCCESS” << endl; } catch (SQLException ex) { cout << “ Error Number : “<< ex.getErrorCode() << endl; //取出异常代码 cout << ex.getMessage() << endl; //取出异常信息 }

conn->terminateStatement(stmt); //终止Statement对象 env->terminateConnection(conn); //断开数据库连接

Environment::terminateEnvironment(env); //终止环境变量

return 1; }

5.2. 非查询流程处理示例

下面给出了一个insert例子inserttab.cpp，通过使用OCCI接口函数往数据库表student中插入信息（学号，学生姓名）。

#include <iostream>