VC++6.0 访问Mysql一完整例子

VC++6.0
要进行设置

工具
/
选项
/
添加目录（
mysql.h
）所在目录

#if defined(_WIN32) || defined(_WIN64) //
为了支持
windows
平台上的编译

#include <windows.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#include "mysql.h" //
我的机器上该文件在
D:/mysql/include
下

//
定义数据库操作的宏，也可以不定义留着后面直接写进代码

#define SELECT_QUERY "select sex from
employee where employee_id = %d"

#pragma
comment(lib,"D://mysql//lib//opt//libmysql.lib")

int main(int argc, char **argv) //char
**argv
相当于
char
*argv[]

{

MYSQL mysql,*sock; //
定义数据库连接的句柄，它被用于几乎所有的
MySQL
函数

MYSQL_RES
*res; //
查询结果集，结构类型

MYSQL_FIELD *fd ; //
包含字段信息的结构

MYSQL_ROW row ; //
存放一行查询结果的字符串数组

char qbuf[160]; //
存放查询
sql
语句字符串

if (argc != 2) { //
检查输入参数

fprintf(stderr,"usage : mysql_select <userid>/n/n");

exit(1);

}

mysql_init(&mysql);

if (!(sock =
mysql_real_connect(&mysql,"localhost","root","wuqx168","mydb",0,NULL,0)))
{

fprintf(stderr,"Couldn't connect to
engine!/n%s/n/n",mysql_error(&mysql));

perror("");

exit(1);

}

sprintf(qbuf,SELECT_QUERY,atoi(argv[1]));

if(mysql_query(sock,qbuf)) {

fprintf(stderr,"Query failed (%s)/n",mysql_error(sock));

exit(1);

}

if (!(res=mysql_store_result(sock))) {

fprintf(stderr,"Couldn't get result from %s/n",
mysql_error(sock));

exit(1);

}

printf("number of fields returned:
%d/n",mysql_num_fields(res));

while (row = mysql_fetch_row(res)) {

printf("Ther employee_id #%d 's sex is: %s/n",
atoi(argv[1]),(((row[0]==NULL)&&(!strlen(row[0]))) ? "NULL" :
row[0])) ;

puts( "query ok !/n" ) ;

}

mysql_free_result(res);

mysql_close(sock);

exit(0);

return 0;

}

命令行运行：

C:/Documents and Settings/l/
桌面
/
新建文件夹
(2)/Debug>mysql 200301

number of fields returned: 1

Ther userid #200301 's sex is: m

query ok !

查询数据库信息

C:/Documents and Settings/l>mysql -u
root -p

Enter password: *******

Welcome to the MySQL monitor. Commands end with ; or /g.

Your MySQL connection id is 1

Server version: 5.1.34-community
MySQL Community Server (GPL)

Type 'help;' or '/h' for help. Type '/c' to
clear the current input statement.

mysql> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema |

| base1 |

| mydb |

| mysql |

| proj |

| test |

+--------------------+

6 rows in set (0.08 sec)

mysql> use mydb;

Database changed

mysql> show tables;

+----------------+

| Tables_in_mydb |

+----------------+

| employee |

| products |

| test1 |

+----------------+

3 rows in set (0.03 sec)

mysql> describe employee;

+-------------+---------+------+-----+---------+-------+

| Field | Type
| Null | Key | Default | Extra |

+-------------+---------+------+-----+---------+-------+

| employee_id | char(6) | NO | PRI | NULL |
|

| name | char(8) | YES | MUL | NULL |
|

| sex | char(2) | YES | |
NULL | |

| birthday | date
| YES | | NULL
| |

+-------------+---------+------+-----+---------+-------+

4 rows in set (0.01 sec)

mysql> select *from employee;

+-------------+----------+------+------------+

| employee_id | name | sex
| birthday |

+-------------+----------+------+------------+

| 200301 | zhangsan | m | 1978-05-08 |

| 200302 | lisi
| f | 1973-03-20
|

| 200303 | wangwu
| f | 1970-10-09
|

| 200304 | zhaoliu
| m | 1975-01-18 |

+-------------+----------+------+------------+

4 rows in set (0.00 sec)

mysql>