1.conn = mysql_init(NULL);//初始化 MYSQL *conn;
2.mysql_real_connect(conn, "localhost", "root", "123456", "xpy", 0, NULL, CLIENT_FOUND_ROWS) 失敗：NULL 建立一個連接
3.res = mysql_query(conn,query);//查詢 int res 成功:0; char query[128] = "select * from lyy2";
4.res_ptr = mysql_store_result(conn);//接受返回數據 MYSQL_RES *res_ptr;
5.column = mysql_num_fields(res_ptr);//統計返回的列數或字段數 int row, column;
6.row = mysql_num_rows(res_ptr);//統計反匯的行數
7.field = mysql_fetch_field(res_ptr)//MYSQL_FIELD *field; 每次打印一個字段名字(field->name)
8.result_row = mysql_fetch_row(res_ptr);//MYSQL_ROW result_row;每次取出一行。result_row[column]一行字每個字段的值
9.mysql_close(conn);//關閉連接