仅显示一列Datagridview mysql vb.net

我有一个数据库表schedule，它有7列（ID、Reserve\u No、Lastname、Firstname、Service、PhoneNumber、Date\u Time），我只想显示列Date\u Time

下面是我在Datagridview上显示数据库的代码

Dim DataAdapter As New MySqlDataAdapter
        Dim DataTable As New DataTable
        Dim cmd As New MySqlCommand
        MySqlConn.Open()
        With cmd
            .Connection = MySqlConn
            .CommandText = "SELECT * FROM schedule"
        End With
        DataAdapter.SelectCommand = cmd
        DataTable.Clear()
        DataAdapter.Fill(DataTable)
        DataGridView1.DataSource = DataTable
        MySqlConn.Close()

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从MySQL表中选择列：

如果不希望看到表中的整行，只需命名 您感兴趣的列，用逗号分隔

将查询更改为选择一列：

    Dim DataAdapter As New MySqlDataAdapter
    Dim DataTable As New DataTable
    Dim cmd As New MySqlCommand
    MySqlConn.Open()
    With cmd
        .Connection = MySqlConn
        .CommandText = "SELECT Date_Time FROM schedule"
    End With
    DataAdapter.SelectCommand = cmd
    DataTable.Clear()
    DataAdapter.Fill(DataTable)
    DataGridView1.DataSource = DataTable
    MySqlConn.Close()

您还可以检索每个唯一的输出，以最小化输出 通过添加关键字DISTINCT只记录一次

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从计划中选择日期和时间