How to obtain aggregate results using ODBC?
How do I obtain results of an aggreate functions like SUM etc? I have an MFC application that uses CRecordset. Following is the code snip:
CDatabase db1;
o1 db; // class that is a sub class of CRecordset and makes a connection to the Oracle
// database
try
BOOL bUseCursorLib = FALSE;
db1.Open(_T( "globaldb" ), FALSE, FALSE, _T( "ODBC;UID=scott;PWD=tiger" ),FALSE);
catch(CDBException* e)
TRACE0(e->m_strError + "\n");
AfxMessageBox("Error... "+e->m_strError);
e->Delete();
if( db1.IsOpen() )
db1.Close();
CString strCmd = "select sum(ordernumber) from orders";
try
db1.ExecuteSQL( strCmd );
catch(CDBException *e)
AfxMessageBox("Error here: "+e->m_strError);
CString t;
t.Format("Sum=%ld",db.m_sum_ORDERNUMBER);
AfxMessageBox(t);
I always get zero displayed as the sum. I am going wrong somewhere for sure. I am not able to figure out.
This ought to work. Can you verify that you have the latest ODBC driver and that you have the proper version of the MDAC installed?
Justin
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