Есть ли какой-нибудь возможный способ показать все имя материала в datagridview, даже если другой столбец пуст?

Question

В моей программе инвентаризации было 3 таблицы в моей базе данных. 1. Вход Колонка (идентификатор, материал, количество) 2. Выход Колонка (идентификатор, материал, количество) 3. MaterialList (Таблица) Где я могу ввести названия материалов Колонка (идентификатор, материал)

В моей оставшейся форме Запасов я хочу показать Оставшиеся Запасы всего Списка материалов, включая материал, который не имеет запасов.

Например: Из MaterialList Из количества ввода и вывода Список материалов Остальные запасы Item1 150 item2
item3
item4 200

Я пробовал это, но надежды нет.

   conn.Open()
        conn = New MySqlConnection
        conn.ConnectionString = "server=localhost;userid=root;password=SOUTHEAST;database=reportingsystem"
        Dim searchquery As String = "select reportingsystem.rawmaterialswarehouseandrawmaterials.Rawmaterials, reportingsystem.rawmaterialswarehouseandrawmaterials.safetystocks, (Sum(reportingsystem.rawmaterialsinput.Quantity) - sum(reportingsystem.rawmaterialsoutput.Quantity)) as 'Remaining Stocks' from reportingsystem.rawmaterialsinput, reportingsystem.rawmaterialsoutput, reportingsystem.rawmaterialswarehouseandrawmaterials where reportingsystem.rawmaterialsinput.RawMaterial = reportingsystem.rawmaterialswarehouseandrawmaterials.Rawmaterials" ' JOIN reportingsystem.rawmaterialsinput.RawMaterial ON reportingsystem.rawmaterialswarehouseandrawmaterials.Rawmaterials = reportingsystem.rawmaterialsinput.RawMaterial ORDER BY reportingsystem.rawmaterialswarehouseandrawmaterials.Rawmaterials"
        'Select rawmaterialsinput.DeliveryDate as 'Delivery Date', rawmaterialswarehouseandrawmaterials.Rawmaterials, (sum(rawmaterialsinput.Quantity) - sum(rawmaterialsoutput.Quantity)) as 'Quantity' , rawmaterialswarehouseandrawmaterials.safetystocks from reportingsystem.rawmaterialsinput, reportingsystem.rawmaterialsoutput, reportingsystem.rawmaterialswarehouseandrawmaterials where rawmaterialsinput.RawMaterial = rawmaterialsoutput.RawMaterial
        '"Select rawmaterialswarehouseandrawmaterials.Rawmaterials as 'Raw Materials', rawmaterialswarehouseandrawmaterials.safetystocks as 'Safety Stock', (sum(rawmaterialsinput.Quantity) - sum(rawmaterialsoutput.Quantity)) as 'Remaining Stocks' where rawmaterialsinput.RawMaterial = rawmaterialswarehouseandrawmaterials.Rawmaterials FROM reportingsystem.rawmaterialswarehouseandrawmaterials, reportingsystem.rawmaterialsinput, reportingsystem.rawmaterialsoutput"
        'Select rawmaterialswarehouseandmaterials.Rawmaterials, (sum(rawmaterialsinput.Quantity) - sum(rawmaterialsoutput.Quantity)) as 'Remaining Stocks', rawmaterialswarehouseandrawmaterials.safetystocks FROM reportingsystem.rawmaterialswarehouseandrawmaterials, reportingsystem.rawmaterialsinput, reportingsystem.rawmaterialsoutput JOIN input ON rawmaterialsinput.RawMaterial = rawmaterialswarehouseandrawmaterials.Rawmaterials
        Dim commander As New MySqlCommand(searchquery, conn)
        Dim adapter As New MySqlDataAdapter(commander)

        monitoringdata.Clear()

        adapter.Fill(monitoringdata)

        MonitoringDGV.DataSource = monitoringdata

        For Each row As DataGridViewRow In MonitoringDGV.Rows
            Dim quantity As Integer = Val(row.Cells(1).Value)
            Dim safetystocks As Integer = Val(row.Cells(2).Value)
            If safetystocks < quantity Then
                row.DefaultCellStyle.BackColor = Color.Red

            ElseIf safetystocks < (quantity * 1.2) Then

                row.DefaultCellStyle.BackColor = Color.Green


            ElseIf safetystocks > (quantity * 1.2) Then
                row.DefaultCellStyle.BackColor = Color.Green

            End If
        Next
        conn.Close()   

Что мне действительно нужно, так это показать все Название материала в столбце 1 и показать оставшиеся запасы в столбце 2.

Пример:

Остаток материала Item1 1 Item2 4 Item3
Item4 Item5 18 Item6 30 Ст.7