Getting all item in a special column of database

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hi all
I am very new in connecting sql server to c++ program.
My Problem is the query that I run only return value in first row
and I want all rows' data in special column.

What I have tried:

if (SQL_SUCCESS != SQLExecDirect(hstmt, (SQLWCHAR*)L"SELECT Location FROM dbo.Customers", SQL_NTS)) {
					   		cout << "Error querying SQL Server";
					   		cout << "\n";
					   	}
				   else
				   {
						SQLCHAR sqlVersion[SQL_RESULT_LEN];
						SQLINTEGER ptrSqlVersion;
						while (SQLFetch(hstmt) == SQL_SUCCESS) {
							SQLGetData(hstmt, 2, SQL_CHAR, sqlVersion, SQL_RESULT_LEN, &ptrSqlVersion);
							//display query result
							cout << "\nQuery Result:\n\n";
							cout << sqlVersion << endl;
						}
				   }

Posted 5-Aug-18 23:27pm

saide_a

Updated 6-Aug-18 0:28am

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Jochen Arndt · Answer 1 · 2018-08-06T00:28:00

Your code is not printing the value of the first row but the same random value for each row.

Your query specifies a single column only. So you can only get data for column one but you are asking for column 2. You would have noticed this when checking the GetData() return value.

So try this:

SQLRETURN ret = SQLGetData(hstmt, 1, SQL_CHAR, sqlVersion, sizeof(sqlVersion), &ptrSqlVersion);
// Check ret here