向表中插入(删除)一条数据 #include
#include
using namespace std;
int main(int argc, char* argv[])
{
//准备mysql的访问结构
MYSQL mysql;
mysql_init( &mysql );
mysql_real_connect(
&mysql,
"192.168.16.114",//要访问数据库的IP地址
"root",//用户名
"root",//密码
"test",//要访问的数据库
3306,//该数据库的端口
NULL,//一般为NULL
0//一般为0
);
//插入
string sql = "insert into student value(1, 'jp', 24, 'gzjd')";
//删除
//string sql = "delete from student where id = 33";
//执行sql语句
mysql_query( &mysql, sql.c_str() );
//关闭数据库连接
mysql_close( &mysql );
return 0;
}
//编译
//g++ file.cpp -o target -lmysqlclient
//执行
//./target
//验证
//成功
更新表内容 #include
#include
using namespace std;
int main(int argc, char* argv[])
{
MYSQL mysql;
mysql_init( &mysql );
mysql_real_connect(
&mysql,
"192.168.16.114",
"root",
"root",
"test",
3306,
NULL,
0
);
string sql = "update student set name = 'pj' where id = 2";
mysql_query( &mysql, sql.c_str() );
mysql_close(&mysql);
return 0;
}
调用存储过程 #include
#include
using namespace std;
int main(int argc, char* argv[])
{
MYSQL mysql;
mysql_init( &mysql );
mysql_real_connect(
&mysql,
"192.168.16.114",
"root",
"root",
"test",
3306,
NULL,
0
);
string sql = "call myPorc();";
int ret = mysql_query( &mysql, sql.c_str() );
// debug info
//cout << mysql_error( &mysql );
//cout << ret << endl;
mysql_close(&mysql);
return 0;
}
查询数据表的内容 #include
#include
using namespace std;
int main(int argc, char* argv[])
{
MYSQL mysql;
mysql_init( &mysql );
mysql_real_connect(
&mysql,
"192.168.16.114",
"root",
"root",
"test",
3306,
NULL,
0
);
string sql = "select * from student";
mysql_query( &mysql, sql.c_str() );
MYSQL_RES *result = NULL;
result = mysql_store_result( &mysql );
//得到查询出来所有数据的条数
int row_count = mysql_num_rows( result );
cout << "all data number: " << row_count << endl;
//得到字段的个数和字段的名字
int field_count = mysql_num_fields( result );
cout << "field count : " << field_count << endl;
//得到所有字段的名字
MYSQL_FIELD* field = NULL;
for( int i = 0; i < field_count; ++i)
{
field = mysql_fetch_field_direct( result, i );
cout << field->name << "\t";
}
cout << endl;
//显示表中的所有数据
MYSQL_ROW row = NULL;
row = mysql_fetch_row( result );
while ( NULL != row )
{
for( int i = 0; i < field_count; ++i)
{
cout << row[i] << "\t";
}
cout << endl;
row = mysql_fetch_row( result );
}
mysql_free_result(result);
mysql_close( &mysql );
return 0;
}
得到指定数据库test中的所有表#include
#include
#include
#include
using namespace std;
int main(int argc, char* argv[])
{
//定义一个数据库连接句柄
MYSQL mysql;
//对数据句柄进行初始化
mysql_init( &mysql );
//连接数据库
mysql_real_connect(
&mysql,
"192.168.16.114",
"root",
"root",
"test",
3306,
NULL,
0
);
//查询数据库
string sql = "show tables;";
mysql_query( &mysql, sql.c_str() );
MYSQL_RES *result = NULL;
result = mysql_store_result( &mysql );
//得到查询出来所有数据记录的数量
vector allTable;
MYSQL_ROW row = mysql_fetch_row( result );
while( NULL != row )
{
allTable.push_back( row[0] );
row = mysql_fetch_row( result );
}
for(vector::const_iterator cit = allTable.begin(); cit != allTable.end(); ++cit )
{
cout << *cit << "\t";
}
cout << endl;
mysql_free_result( result );
mysql_close( &mysql );
return 0;
}
