Question

Private Sub Default__Load(ByVal Sender As System.Object, ByVal e As System.EventArgs)     Handles MyBase.Load

    Dim conn As SqlConnection = New SqlConnection("datasource=xxx;database=xxx;uid=xxx;pwd=xxx;")
    Dim cmd As SqlCommand = New SqlCommand("SELECT ID FROM Table WHERE DateTimeCreated = ???????????", conn)

    conn.Open()
    Dim ID As String = Convert.ToString(cmd.ExecuteScalar())
    conn.Close()


    lblID.Text = ID

End Sub

基本上我需要一些东西来取代????????带来最近创建的ID（ID是uniqueidentifier）

我确信这很简单，不过我可能会把整件事搞错了。

Answer 1

你应该在那里使用这样的东西来获得最新的ID

(SELECT TOP 1 ID FROM table
ORDER BY DateTimeCreated DESC)

取代你的?????当然。

EDITED

从表中选择最近的记录

1 个答案: