亚洲成熟xxxxx电影,日本亚洲国产一区二区三区,亚洲国产精品ⅴa在线观看

Mysql C 带事务管理的��d��查改

Sat, 15 Mar 2008 09:33:00 GMT

今天写的例子,只脓代码,不��用文字说�?
mysqltool.h

#include <stdio.h>
#include <stdlib.h>
#include <winsock.h>
#include <mysql.h>

int xinsert(MYSQL *mysql,char *strsql)
{
     int t;
     MYSQL_RES *res;
     t=mysql_real_query(mysql,strsql,(unsigned int)strlen(strsql));

     if(t){
           printf( "Error id=%d  Error: %s\n",mysql_errno(mysql),mysql_error(mysql));
           return mysql_errno(mysql);
     }else{
         res=mysql_store_result(mysql);
         printf("插入行数=%d\n",mysql_affected_rows(mysql));
         mysql_free_result(res);
     }

     return 0;

}

int xupate(MYSQL *mysql,char *strsql)
{
     int t;
     MYSQL_RES *res;
     t=mysql_real_query(mysql,strsql,(unsigned int)strlen(strsql));
     if(t){
           printf( "Error id=%d  Error: %s\n",mysql_errno(mysql),mysql_error(mysql));
           return mysql_errno(mysql);
     }else{
         res=mysql_store_result(mysql);
         printf("更新行数=%d\n",mysql_affected_rows(mysql));
         mysql_free_result(res);
     }
     return 0;
}

int xdelete(MYSQL *mysql,char *strsql)
{
     int t;
     MYSQL_RES *res;
     t=mysql_real_query(mysql,strsql,(unsigned int)strlen(strsql));
     if(t){
           printf( "Error id=%d  Error: %s\n",mysql_errno(mysql),mysql_error(mysql));
           return mysql_errno(mysql);
     }else{
         res=mysql_store_result(mysql);
         printf("删行�?%d\n",mysql_affected_rows(mysql));
         mysql_free_result(res);
     }
     return 0;

}

one.c 代码如下:

#include <stdlib.h>
#include <winsock.h>
#include <mysql.h>
#include <stdio.h>
#include <mysqltool.h>

int main()
{
      MYSQL mysql;     //mysql�q�接
      MYSQL_RES *res; //�q�个�l�构代表�q�回行的一个查询结果集
      MYSQL_ROW row; //一个行数据的类型安�?type-safe)的表�C?/span>
      char *query;  //查询语句
      int t,r;
      mysql_init(&mysql);


      if (!mysql_real_connect(&mysql,"localhost", "lottobar", "123456", "lottobar",3306,NULL,0))
      {
         printf( "Error connecting to database: %s\n",mysql_error(&mysql));
      }  else
         printf("Connected\n");


      query="SET CHARACTER SET GBK"; //讄��~�码
      t=mysql_real_query(&mysql,query,(unsigned int)strlen(query));
      if(t)
      {
           printf("�~�码讄��p�|\n");
      }
      query=" select * from demo ";
      t=mysql_real_query(&mysql,query,(unsigned int)strlen(query));
      if(t)
      {
          printf("执行查询时出现异�? %s",mysql_error(&mysql));

      }else
          printf("[%s] 构徏成功 \n",query);
      res=mysql_store_result(&mysql);
      while(row=mysql_fetch_row(res))
      {
           for(t=0;t<mysql_num_fields(res);t++)
           {
               printf("%s\t",row[t]);
           }
           printf("\n");
      }
      mysql_free_result(res);

      t=mysql_real_query(&mysql,"SET AUTOCOMMIT =0",(unsigned int)strlen("SET AUTOCOMMIT =0"));
      if(t){
            printf("启用手工事务��p�|\n");
      }else{
            printf("启用手工事务成功\n");
      }
      t=mysql_real_query(&mysql,"Begin ;",(unsigned int)strlen("Begin ;"));
      query="insert into demo(name,age)values('老裴','89')";
      int inset_result=xinsert(&mysql,query);
      query="delete  from demo  where name='老裴'";
      int delete_result=xdelete(&mysql,query);
      query="update demo set name='裴屋�? where name='ccd' and inc_id=13";
      int update_result=xupate(&mysql,query);

      query="insert into demo(inc_id,name,age)values(16,'老裴','89')";//执行会出现异常的语句
      int fail_result=xinsert(&mysql,query);

      if(inset_result==0 && delete_result==0 && update_result==0 && fail_result==0){
           printf("事务提交\n");
           t=mysql_real_query(&mysql,"COMMIT;",(unsigned int)strlen("COMMIT;"));
      }else{
           printf("事务回滚\n");
           t=mysql_real_query(&mysql,"ROLLBACK;",(unsigned int)strlen("ROLLBACK;"));
      }

      return 0;
}

有猫�怼�的日�?/a> 2008-03-15 17:33 发表评论

Windows�q�_��下Mysql C�E�序设计

Sun, 09 Mar 2008 10:26:00 GMT

Windows�q�_��?/span>Mysql C�E�序设计

一�?span style="font-family: 宋体">哆嗦一�?/span>

从打开始学�~�程以来�Q�接触的�W�一门真正的�~�程语言�?/span>C�Q?/span>foxbase不算�Q�，惛_��q�俺自学完浩强叔那本�?/span>C语言�E�序设计》时�Q�老师才开始教pascal。自毕业以来一直没有机会写�q�有应用价值的C�E�序�Q�从Delphi做到J2EE。打��从现在开始利用业余时间学�?/span>Pro*C�Q?/span>Mysql C�Q�也不知为啥�?/span>C念念不忘�Q�却没机�?/span>C来写�E�序�?/span>

二�?span style="font-family: 宋体">开发环�?/span>

1�?nbsp;windowsXP

2�?nbsp;mysql 5.0.22

3�?nbsp;Dev-C++ 4.9.9.2

4�?nbsp;Mysql C for Dev-Cpp (MySQL.DevPak)

a) 用过Dev-C++的�h都应该知�?/span>devpak吧我��׃��详说�Q�如果你用的�?/span>C++�Q�请下蝲(mysqlpp-2.3.2-gcc3.4.2-1due.DevPak)

b) MySQL.DevPak 下蝲地址�Q?/span> http://downloads.sourceforge.net/dev-cpp/MySQL.DevPak

三�?span style="font-family: 宋体">安装及配�|?/span>

1、双�?/span>MySQL.DevPak文�g�Q�按步骤把这开发包安装完成。直�?/span>package Mangaer 出现“MySQL”卛_��?/span>

2、单�?#8220;工具”->“�~�译选项”->“�~�译�?#8221;->“在连接器命��o行中加下以下命��o”�Q�选择�Q�，在下面的文本框中��d��-lmysql �?/span>

3、在Dev-C++中添�?/span>mysql�?/span>lib�?/span>include 文�g�Q�具体方�?/span>:

“工具”->“�~�译选项”->“�~�译�?#8221;->“目录” 中添�?/span>

四�?span style="font-family: 宋体">例程代码

#include

Name: ��试例子

Author: 裴�d�?/span>

Date: 09-03-08 18:14

Description:

int main()

{

MYSQL mysql; //mysql�q�接

MYSQL_RES *res; //�q�个�l�构代表�q�回行的一个查询结果集

MYSQL_ROW row; //一个行数据的类型安�?/span>(type-safe)的表�C?/span>

char *query; //查询语句

int t,r;

mysql_init(&mysql);

if (!mysql_real_connect(&mysql,"localhost", "lottobar", "123456", "lottobar",3306,NULL,0))

{

printf( "Error connecting to database: %s"n",mysql_error(&mysql));

} else

printf("Connected..."n");

query="SET CHARACTER SET GBK"; //讄��~�码

t=mysql_real_query(&mysql,query,(unsigned int)strlen(query));

if(t)

{

printf("�~�码讄��p�|"n");

}

query=" select * from demo ";

t=mysql_real_query(&mysql,query,(unsigned int)strlen(query));

if(t)

{

printf("执行查询时出现异�?/span>: %s",mysql_error(&mysql));

}else

printf("[%s] 构徏成功 "n",query);

res=mysql_store_result(&mysql);

while(row=mysql_fetch_row(res))

{

for(t=0;t

{

printf("%s"t",row[t]);

}

printf(""n");

}

mysql_free_result(res);

sleep(1);

return 0;

}

五�?span style="font-family: 宋体">注意事项

Windows C�E�序讑֏�要涉及网�l�的都应该加上这两个文�g�Q�否则肯定出�?/span>

#include

Mysql C��q��的解��x��?/span>

query="SET CHARACTER SET GBK"; //讄��~�码

t=mysql_real_query(&mysql,query,(unsigned int)strlen(query));

如果你有问题可以�?/span>www.tkk7.com/pdw2009��M��?/span>

该文属作者原�?转蝲��h��明出: http://www.tkk7.com/pdw2009

有猫�怼�的日�?/a> 2008-03-09 18:26 发表评论

Fri, 28 Sep 2007 03:09:00 GMT

共有4�U�构�Ҏ��构造动态SQL语句�Q?br /> 1、方法一�Q?br />        仅适用于非SELECT语句�Q�且语句中不包含输入宿主变量。格式如�?br />        EXEC SQL EXECUTE IMMEDIATE :host_string �?br />         EXEC SQL EXECUTE IMMEDIATE "UPDATE XX SET NAME=yyyy HERE ID=1"

2、方法二�Q?br /> 　　也只适用于非�Q�I�I�Q��I�Q�Ｔ语句�Q�Ｓ�Q�Ｌ语句可包含虚拟输入宿��d��量和指示器变量，但它们的个数和数据类型在预编译时必须是可知的�?br />          处理分三步：
        A、构造一个动态SQL语句�?br />         B、用PREPARE 语句来分析和命名该动态SQL语句
        C、用EXECUTE 来执�?br />      EXEC SQL PREPARE 用于分析一个动态SQL�Q�如
        strcpy(sql_stmt,"DELETE FROM EMP WHERE JOB=:v");
         EXEC SQL PREPARE stmt FROM :sql_stmt;
    EXECUTE 语句格式�Q?br />      EXE�Q�　�Q�I��Q�　�Q�Ｏ�Q�Ӏ�<行数> EXECUTE <动态语�?gt; USING <参数>
    EXEC SQL EXECUTE stmt USING :job;

3、方法三�Q?br />      �Ҏ��三只适用于SELECT语句�Q�语句中包含选择表项个数�Q�和虚拟输入宿主变量个数在预�~�译旉��是已知的�Q�但是数据库的表、列名可能运行时指定。步骤如下：
     1、定义动态脚本�?br />      2、分析动态脚本�?br />      3、定义游标，游标的语句就是动态分析的名�?br />      代码例子:
        strcpy(sql_stmt,"SELECT SID,ENAME FROM EMP WHERE JOB=:v");
         EXEC SQL PREPARE stmt FROM :sql_stmt;
        EXEC SQL DECLARE cur FOR stmt ;
       然后遍历游标:

for(;;)
    {
         EXEC SQL for :n FETCH stud_cur  INTO :stud_id,:stud_age,:stud_n
ame,:stud_addr;
         rows=sqlca.sqlerrd[2];
printf("rows=%d\n",rows);
         int i;
if(sqlca.sqlcode<0) {
printf("ora err:%d",sqlca.sqlcode);
break;
}
rows=sqlca.sqlerrd[2]-n*j;
         for(i=0;i<rows;i++)
         {
              printf("%d--%d--%s--%s\n",stud_id[i],stud_age[i],stud_name
[i].arr,stud_addr[i].arr);
         }
         j++;
         printf("currsor %d times\n",j);
if ((sqlca.sqlcode == 1403) ) break;
    }

上面遍因游标是一�ơ取N条记录的�Q�因为stud_id�{�是数组�Q�n为数�l�长�?br /> 一个完整的动态游标例�?br />

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
EXEC SQL include sqlca;
#ifdef TRUE
#undef TRUE
#endif

#define TRUE 1

EXEC ORACLE OPTION (RELEASE_CURSOR = YES);
EXEC SQL BEGIN DECLARE SECTION;
                VARCHAR username[20];
                VARCHAR password[20];

EXEC SQL END DECLARE SECTION;

void sql_error()
{
    EXEC SQL WHENEVER SQLERROR CONTINUE;
    printf("\n Oracle error detected:\n");
    printf("\n%.70s\n",sqlca.sqlerrm.sqlerrmc);
    EXEC SQL ROLLBACK RELEASE;
    exit(1);
}
void dyna_cursor()
{
    EXEC SQL BEGIN DECLARE SECTION;
        char *sql_str;
        int stud_id;
        int stud_age;
        VARCHAR stud_name[20];
        VARCHAR stud_addr[60];
        int vage;
    EXEC SQL END   DECLARE SECTION;
    sql_str=(char *)malloc(400);
    vage=3;
    strcpy(sql_str,"SELECT STUD_ID,STUD_NAME FROM PROC_STUD WHERE STUD_A
GE=:v1");
    EXEC SQL PREPARE S FROM :sql_str;
    EXEC SQL DECLARE C CURSOR  FOR S;
    printf("please input age :\n");
    scanf("%d",&vage);
    EXEC SQL OPEN C USING :vage;
    EXEC SQL WHENEVER NOT FOUND GOTO notfound;
    while(TRUE)
    {
        EXEC SQL FETCH C INTO :stud_id,:stud_name;
        /*stud_name.arr[stud_name.len]='\0';*/
        /*stud_name.len=strlen(stud_name.arr);*/
        printf("%d\t%s\n",stud_id,stud_name.arr);
    }
notfound:
    printf("\nQuery Returned %d row %s\n",sqlca.sqlerrd[2],sql_str);
    EXEC SQL CLOSE C;
    EXEC SQL COMMIT RELEASE;
    printf("Have a good day!\n");
    exit(0);
sqlerror:
    printf("%d %.*s\n",sqlca.sqlerrm.sqlerrml,sqlca.sqlerrm.sqlerrmc);
    EXEC SQL WHENEVER SQLERROR CONTINUE;
    EXEC SQL CLOSE C;
    EXEC SQL ROLLBACK RELEASE;
    exit(1);
}

main()
{
     strcpy(username.arr,"gdnum_true");
     strcpy(password.arr,"gdnumtrue_10");
     username.len=strlen(username.arr);
     password.len=strlen(password.arr);

     EXEC SQL CONNECT :username IDENTIFIED BY :password;
     printf("sqlca.sqlcode=%d;\n",sqlca.sqlcode);
     printf("login user=%s\n",username.arr);
     dyna_cursor();
     exit(0);
}

4、方法四

有猫�怼�的日�?/a> 2007-09-28 11:09 发表评论

proc�Q�添、删、查、改

Sun, 23 Sep 2007 11:41:00 GMT

proc 有两�U�方式登陆数据库
1、登陆到默认数据�?br />       A、有IDENTIFIED BY 子句�Q�其格式如下�Q?br />               EXEC SQL CONNECT �Q�username IDENTIFIED BY :password
     B、没有IDENTIFIED BY子句
              EXEC SQL CONNECT :usr_pwd
           usr_pwd�?分隔用户名和口��o
2、显式登�?br />        EXEC SQL BEGIN DECLARE SECTION
            VARCHARE username[20];
            VARCHARE password[20];
            VARCHARE dbname[20];
       EXEC SQL END DECLARE SECTION
      /*附��|��?/
      EXEC SQL DECLARE dbname DATABASE;
      /*登陆�q�程非默认数据库*/
     EXEC SQL CONNECTION :username IDENTIFIELD BY :password
     AT   db_like_name USING :dbname;
    /*如果db_like_name 是宿��d��量就不用定义*/
郁闷在hpux下写好多例程�Q�可不小心一个rm��干掉了, 没法再更�?br />

有猫�怼�的日�?/a> 2007-09-23 19:41 发表评论

一个最��单的pro*c�E�序

Mon, 17 Sep 2007 06:12:00 GMT

环境�Q�hpux,oracle 9.1.2.0 ,cc

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
EXEC SQL include sqlca;
EXEC ORACLE OPTION (RELEASE_CURSOR = YES);
EXEC SQL BEGIN DECLARE SECTION;
                VARCHAR username[20];
                VARCHAR password[20];
EXEC SQL END DECLARE SECTION;

void sql_error()
{
                EXEC SQL WHENEVER SQLERROR CONTINUE;
                printf("\n Oracle error detected:\n");
                printf("\n%.70s\n",sqlca.sqlerrm.sqlerrmc);
                EXEC SQL ROLLBACK RELEASE;
exit(1);
}

main()
{
                strcpy(username.arr,"gdnum_true");
                strcpy(password.arr,"gdnumtrue_10");
                username.len=strlen(username.arr);
                password.len=strlen(password.arr);

                EXEC SQL CONNECT :username IDENTIFIED BY :password;
                printf("sqlca.sqlcode=%d;\n",sqlca.sqlcode);
                printf("login user=%s",username.arr);
                exit(0);
}

proc pro1.pc
cc -o pro1 pro1.c -L $ORACLE_HOME/lib32 -lclntsh
不作文字说明�Q�只作例�E�记�?

有猫�怼�的日�?/a> 2007-09-17 14:12 发表评论

亚洲成熟xxxxx电影,日本亚洲国产一区二区三区,亚洲国产精品ⅴa在线观看

Mysql C 带事务管理的��d��查改

Windows�q�_��下Mysql C�E�序设计

proc�Q�添、删、查、改

一个最���单的pro*c�E�序

一个最��单的pro*c�E�序