var sqlstr = `SELECT
    col1,
    col2,
    col3
    FROM public.table t1
    join public.tableb b on b.id = t1.col1
    join public.tablec c on c.id = t1.col2`

    q, err := db.Query(sqlstr)
    if err != nil {

    }
    defer q.Close()

    res = []*myStruct{}
    for q.Next() {
        info := myStruct{}

        // scan
        err = q.Scan(&info.Field1, &info.Field2, &info.Field3)
        if err != nil {

        }

        res = append(res, &bInfo)
    }

    return res, nil