<b>Linux操作系统下的Oracle数据库编程详解</b>[MySQL防范]

#JAVA环境设置
export CLASSPATH=.:/usr/local/java/lib:/usr/local/jre/lib
export JAVA_HOME=/usr/local/java
#Oracle数据库环境设置
export ORACLE_BASE=/home/oracle
export ORACLE_HOME=$ORACLE_BASE
export ORACLE_SID=MyDB
export ORACLE_TERM=vt100
export ORACLE_OWNER=oracle
export TNS_ADMIN=$ORACLE_HOME/network/admin
#设置JDBC和SQLJ的编译和运行环境
export CLASSPATH=:$CLASSPATH:$ORACLE_HOME/jdbc/lib/classes111.zip
export CLASSPATH=:$CLASSPATH:$ORACLE_HOME/jdbc/lib/nls_charset11.zip
export CLASSPATH=:$CLASSPATH:$ORACLE_HOME/sqlj/lib/runtime12.zip
export CLASSPATH=:$CLASSPATH:$ORACLE_HOME/sqlj/lib/translator.zip
#设置搜索途径
export PATH=$PATH:/usr/local/java/bin:/usr/local/jre/bin:/bin:/sbin
            export PATH=$PATH:/usr/bin:/usr/sbin:/usr/local/bin:$ORACLE_HOME/bin

$sqlplus system/manager
SQL>create user test identified by test default tablspace users;
SQL>grant connect to test;
SQL>grant resource to test;
SQL>connect test/test;
SQL>create table student(id number,name varchar2(20),score number);
            SQL>insert into test values(1,’zhang’,95);

#include <stdio.h>
EXEC SQL INCLUDE SQLCA;
void main()
{
  /*声明宿主变量*/
  EXEC SQL BEGIN DECLARE SECTION;
  VARCHAR usr[20],pass[20],serv[20];
  char name[8];
  int id,score;
  EXEC SQL END DECLARE SECTION;
  /*设置衔接数据库的用户名、密码和数据库服务名*/
  strcpy(usr.arr,"test");
  usr.len=(unsigned short)strlen((char *)usr.arr);
  strcpy(pass.arr,"test");
  pass.len=(unsigned short)strlen((char *)pass.arr);
  strcpy(serv.arr,"MyDB");
  serv.len=(unsigned short)strlen((char *)serv.arr);
  /*以test用户衔接数据库*/
  EXEC SQL CONNECT :usr IDENTIFIED BY :pass USING :serv;
  printf("Connect!\n");
  /*用户输入欲查询的ID号*/
  printf("请输入学生代码:");
  scanf("%d",&id);
  /*履行动态的SQL查询语句*/
  EXEC SQL SELECT id,name,score into :id,
  :name,:score from student where id=:id;
  printf("Name=%s    Score=%d\n",name,score);
  /*提交事件并断开与数据库的衔接*/
EXEC SQL COMMIT WORK RELEASE;
  printf("Disconnect!\n");
            }

#include <stdio.h>
EXEC SQL INCLUDE SQLCA;
void main()
{
  /*声明宿主变量*/
  EXEC SQL BEGIN DECLARE SECTION;
  VARCHAR usr[20],pass[20],serv[20];
  char name[8];
  int id,score;
  EXEC SQL END DECLARE SECTION;
  /*设置衔接数据库的用户名、密码和数据库服务名*/
  strcpy(usr.arr,"test");
  usr.len=(unsigned short)strlen((char *)usr.arr);
  strcpy(pass.arr,"test");
  pass.len=(unsigned short)strlen((char *)pass.arr);
  strcpy(serv.arr,"MyDB");
  serv.len=(unsigned short)strlen((char *)serv.arr);
  /*以test用户衔接数据库*/
  EXEC SQL CONNECT :usr IDENTIFIED BY :pass USING :serv;
  printf("Connect!\n");
  /*声明游标*/
  EXEC SQL DECLARE stu_cursor CURSOR FOR
  SELECT id,name,score from student;
  printf("DECLARE CURSOR OK!\n");
  /*翻开游标*/
  EXEC SQL OPEN  stu_cursor;
  printf("OPEN CURSOR OK!\n");
  /*错误处理*/
  EXEC SQL WHENEVER NOT FOUND DO break;
  /*循环拜候游标数据*/
  while(1)
  {
    EXEC SQL FETCH stu_cursor INTO :id,:name,:score;
    printf("Id=%d   Name=%s    Score=%d\n",id,name,score);
  }
  /*关闭游标*/
  EXEC SQL CLOSE stu_cursor;
  /*提交事件并断开与数据库的衔接*/
  EXEC SQL COMMIT WORK RELEASE;
  printf("Disconnect!\n");
              }