Update a table in DB2 from Access

I am trying to develope code to update a table in a DB2 database.

Dim sqlStr As String

 not linked-----------v                 verify SQL
sqlStr = "Update TableInDB2 D Inner Join TableInAccess A On D.AcctNo = A.AcctNo Set D.Budget = A.Budget"
.
.
strDBConnect = "Connection:=ODBC;DSN=PDB2;UID=uuuuu;pwd=ppppp;DBALIAS=PDB2"
Set cmd = New ADODB.Command
                 
cmd.CommandText = sqlStr
cmd.ActiveConnection = strDBConnect
Set rst = cmd.Execute  
.
.

Please put above code in a shape and list your assumptions.

Thank you.
LVL 34
Mike EghtebasDatabase and Application DeveloperAsked:
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Leigh PurvisDatabase DeveloperCommented:
You'd need to open a recordset on the local table - create the SQL statements iteratively - executing them on the server.
(Funnily enough I don't have a DB2 mainframe in my house - total air code, keeping it minimal and assuming DB2 has a pretty much ANSI standard syntax :-S)

Dim strSQL as String
Dim cnn as New ADO.Connection

strDBConnect = "Connection:=ODBC;DSN=PDB2;UID=uuuuu;pwd=ppppp;DBALIAS=PDB2"
cnn.Open strDBConnect

With CurrentProject.Connection.Execute("SELECT * FROM TableInAccess")
    Do Until .EOF
        strSQL = "UPDATE TableInDB2 SET Field2 = " & .Fields("Field2") & ", Field3 = " & .Fields("Field3") & " WHERE Field1 = " & .Fields("Field1")
        cnn.Execute strSQL
        .MoveNext
    Loop
    .Close
End With
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Leigh PurvisDatabase DeveloperCommented:
In a shape?  (A data shape provider?  Don't see how that will help.)
Having one table local and updating it from an external source you'll have to use Access functionality for this (rather than ADO).
Linked tables - or ideally a passthrough.

Otherwise you're to open the data in a recordset - and iterate through that line by line updating your local table - which should rarely be the quickest method.
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Mike EghtebasDatabase and Application DeveloperAuthor Commented:
TableInDB2  is in a main frame computer.  Could be this done?  Having an action query in DB2 could be helpe (to take data from Access and update a table in DB2)?

Mike
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Leigh PurvisDatabase DeveloperCommented:
You could contruct an update statement for each row from the local table that you wanted to update.
And then execute those statements on the server.

If it supports SP's - then you could conceivably write such an SP to receive a string of update values for it to parse and update values there.
That's a bit of work though - and would require intimate knowledge of the tables and fields in question.

For simple results - updating the local Access db from passthrough data (fast enough more than likely).
Update the server tables through linked tables - executing a local Update statement joining the server and local tables  (not fastest - easy to implement and would have to test and see about performance).

Beyond that you're into a series of statements being executed in code. (Rather than one statement).
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Mike EghtebasDatabase and Application DeveloperAuthor Commented:
Linked table may be even not possible after all.

re:> You could contruct an update statement for each row from the local table that you wanted to update.  And then execute those statements on the server

Taing this direction, please use the following tables to do the above:

TableInDB2  
==============
Field1 (PK)
Field2
Field3

TableInAccess  
==============
Field1 (PK/FK one to one)
Field2
Field3

Mike
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Mike EghtebasDatabase and Application DeveloperAuthor Commented:
Thank you.

Mike
0
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