Golang SQL query Errror: missing destination name Sum in *[]main.Tag

I’m trying to feed the results from the SQL Query into the Sum field of my struct however i’m met with this error despite their being a Sum Field in the struct.

The results from the query can range from 1-8 numbers depending on the date input in my REACT interface.

package main

import (
	"encoding/json"
	"log"
	"net/http"
	"time"

	_ "github.com/go-sql-driver/mysql"
	"github.com/jmoiron/sqlx"
)

type Tag struct {
	Sum              string `json:"Sum"`
	Stream_count     string `json:"stream_count"`
	Query_desc       string `json:"Query_Desc"`
	Query_start_date string `json:"Query_start_date"`
	Query_end_date   string `json:"Query_end_date"`
	Current_date     string `json:"Current_date"`
	Error_info       string `json:"Error_Info"`
}


func handler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept")

	db, err := sqlx.Connect("mysql", "****")

	if err != nil {
		log.Print(err.Error())
		log.Print("Error Connecting to DB")
		w.WriteHeader(http.StatusBadRequest)
		w.Write([]byte(err.Error()))
		return
	}
	defer db.Close()

	date_1 := r.FormValue("date_1")
	date_2 := r.FormValue("date_2")
	time_1 := r.FormValue("time_1")
	time_2 := r.FormValue("time_2")

	var tag Tag

	Query := ("SELECT SUM(duration) Sum FROM sessions WHERE (app_id = '****' OR app_id ='****' OR app_id ='****' OR app_id ='****'OR app_id ='****') AND date(created ) between ? and ? and time(created ) between ? and ? AND (`media_src`='https://livestream.indemandradio.com/stream/index.m3u8' OR `media_src`='****' OR `media_src`='****' OR `media_src`='****'  OR `media_src`='****'  OR `media_src`='****') GROUP BY date(created)")

	err = db.Get(&tag, Query, date_1, date_2, time_1, time_2)

	log.Print(tag.Sum)

	tag.Query_desc = "Listener Hours"
	tag.Query_start_date = date_1
	tag.Query_end_date = date_2
	dt := time.Now()
	tag.Current_date = dt.Format("01-02-2006 15:04:05")
	if err != nil {
		tag.Error_info = err.Error()
	}
	
	j, err := json.Marshal(tag)
	if err != nil {
		w.WriteHeader(http.StatusBadRequest)
		w.Write([]byte((err.Error())))
		return
	}
	w.Write(j)

}

func main() {
	http.HandleFunc("/", handler)
	log.Fatal(http.ListenAndServe(":8081", nil))
}

Try this to check if works

var sum int
err = db.Get(&sum, Query, date_1, date_2, time_1, time_2)

if it works it seems sql gets confused about field name so maybe changing
SUM(duration) as Suma or something else could do the trick…