Processing Data in a Result Set

The ODBC obtains data from the database and provides the data to the application program for processing. Functions of ODBC processing include but are not limited to: retrieving data, displaying data, processing data, transmitting data, and implementing service logic.

The ODBC provides APIs for processing data in a result set, as shown in Table 1.

The following is an example (for details about the complete example, see Obtaining and Processing Data in a Database):

// After the SQL statement is executed, obtain the attributes of a column in the result set.
SQLColAttribute(V_OD_hstmt,1,SQL_DESC_TYPE,typename,100,NULL,NULL);
printf("SQLColAtrribute %s\n",typename);  
	
// Bind the result set.
SQLBindCol(V_OD_hstmt,1,SQL_C_SLONG, (SQLPOINTER)&V_OD_buffer,150,
		(SQLLEN *)&V_OD_err);

// Use SQLFetch to obtain data from the result set.
V_OD_erg=SQLFetch(V_OD_hstmt);

// Use SQLGetData to obtain and return data.
while(V_OD_erg != SQL_NO_DATA)
{
  SQLGetData(V_OD_hstmt,1,SQL_C_SLONG,(SQLPOINTER)&V_OD_id,0,NULL);
  printf("SQLGetData ----ID = %d\n",V_OD_id);
  V_OD_erg=SQLFetch(V_OD_hstmt);
};
printf("Done !\n");