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Access Update SQL not working in VB.NET OleDbCommand

Asked by TongZ in VB Database Programming, SQL Query Syntax, Microsoft Access Database

Tags: Access, SQL, VB.NET 2008 Express Ed

Dear all,

The update sql command below works fine from within Access, but failed when called through an OleDbCommand instance:

UPDATE dat SET MONTH = Null WHERE MONTH Is Not Null

Some info:
The connection is opened without problem and other single record update is successfully done through this connection

In the 'dat' table, the MONTH column has some Null (empty) and some zero, the intent is to set all to empty or Null for this field. This MONTH column has no constraint on it whatsoever, it is numeric.

OleDbCommand complains about Update Syntax Error. The code snippet is attached.
As a matter of fact, just for grin, the OleDbCommand failed on the following update as well:

UPDATE dat SET MONTH = 0 WHERE MONTH = 0

Please help,
T

View the Solution FREE for 30 Days

         
             Dim lDbFileName As String = "C:\myDB.mdb"        
        Dim CnInput As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & lDbFileName)
        CnInput.Open()
 
        Dim lSQL As String = "UPDATE dat SET MONTH = Null WHERE MONTH Is Not Null"
        Dim lUpdateCommand As OleDbCommand = New OleDbCommand(lSQL, CnInput)
        lUpdateCommand.CommandTimeout = 30
        lUpdateCommand.ExecuteNonQuery()

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Access Update SQL not working in VB.NET OleDbCommand

Asked by TongZ in VB Database Programming, SQL Query Syntax, Microsoft Access Database

Tags: Access, SQL, VB.NET 2008 Express Ed

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