MySQL编程删除某个元组

mysql> use test;
Database changed
mysql> select * from student;
+------+------+
| Id   | name |
+------+------+
|   29 | Mike |
|   12 | Lili |
+------+------+
2 rows in set (0.00 sec)

mysql> quit
Bye
[root@localhost ~]#

源文件mysql.c如下：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <dirent.h>
#include "/usr/local/mysql/include/mysql.h"

const char* host = "127.0.0.1";
MYSQL* mysql;
const char* user = "root";
const char* password = "";

int main(int argc ,char **argv)
{
        int t, r;

        mysql = mysql_init(mysql);
        mysql = mysql_real_connect(mysql, host, user, password, "test", 0, NULL, 0);

        if (!mysql)
        {
                perror("MySQL connect error!\n");
                return EXIT_FAILURE;
        }

        if (mysql_query(mysql, "delete from student where Id=29"))  // 删除Id=29的那个元组
        {
                perror("MySQL query error!\n");
                return EXIT_FAILURE;
        }

        mysql_close(mysql);

        return 0;
}

[root@localhost ~]# gcc mysql.c -g -I/usr/local/mysql/include -L/usr/local/mysql/lib -lmysqlclient
[root@localhost ~]# ./a.out

mysql> use test;
Database changed
mysql> select * from student;
+------+------+
| Id   | name |
+------+------+
|   12 | Lili |
+------+------+
1 row in set (0.00 sec)

mysql> quit
Bye
[root@localhost ~]#