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MYSQL : Instead of generating  unique number at coding level what is an alternate way?

D Patel
D Patel asked
Last Modified: 2017-11-22
Hi EE,

I have following code in VB.NET.

Public Function GenerateUniNo(ByVal Length As Integer) As String

        Dim ValidChars As String
        ValidChars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"

        Dim i, x As Integer
        Dim password As String = ""
        For i = 1 To Length
            x = Int(Len(ValidChars) * Rnd() + 1)
            password = password & Mid(ValidChars, x, 1)
        GenerateUniNo = password
    End Function

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and it is called using following statement :

Dim dr = dbCommE.ExecuteReader()
            If dr.HasRows Then
                txtUniNo.Text = GenerateUniNo (4)
                If dr(0) = Trim(txtUniNo.Text) Then
                    txtUniNo.Text = ""
                    txtUniNo.Text = GenerateUniNo (4)
                End If
            End If

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How to write trigger or procedure in MYSQL so that same task can be achieved?

Please guide.

D Patel
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