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// Assuming strColumn, strTable, and strPKeyColumn are defined appropriately
// Assuming strValue is the value to be compared

// Retrieve the data type of the column from the database, e.g., using a query or from metadata
// For the sake of example, let's assume the data type is stored in a variable called strColumnType

// Building the query
strQueryBuilder.Append("select isnull(" + strColumn + ", NULL) as output from " + strTable);

// Check if a condition needs to be added
if (strColumnType == "varchar" || strColumnType == "string") {
    strQueryBuilder.Append(" where " + strPKeyColumn + " = '" + strValue + "'");
} else if (strColumnType == "datetime") {
    // Format the date value appropriately based on the SQL syntax
    strQueryBuilder.Append(" where " + strPKeyColumn + " = '" + formatDateToSQL(strValue) + "'");
} else if (strColumnType == "bit") {
    strQueryBuilder.Append(" where " + strPKeyColumn + " = " + strValue);
} else {
    strQueryBuilder.Append(" where " + strPKeyColumn + " = " + strValue); // default case
}

// Execute the query
DataSet objDataSet = objDataAccess.ExecuteSQL(strQueryBuilder.ToString());

// Check if the DataSet is not null and contains data
if (objDataSet != null && objDataSet.Tables.Count > 0 && objDataSet.Tables[0].Rows.Count > 0) {
    // Handle the output value
    string strOutputValueToCompare = "";
    if (Convert.IsDBNull(objDataSet.Tables[0].Rows[0]["output"])) {
        strOutputValueToCompare = "NULL";
    } else {
        strOutputValueToCompare = item4.fnReturnStringValue(objDataSet.Tables[0].Rows[0]["output"]);
    }

    fnf111RDBMSOutput(intCurrentRow, strOutputValueToCompare);
} else {
    // Handle the case where the value is not fetched
    // Perform necessary operations when the value is not fetched
}
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