OLe DB Command And Using The Value Of An Input Column More Than Once

Hi there,

I have an OLE DB Command which updates a table. However, the command needs to use the value of an input column more than once.

For example I want to update TableA only if either ColumnA or ColumnB have actually changed: -
update tableA
set columnA = ?,
column B = ?
where columnC = ?
AND (columnA != ? OR columnB != ?)

I can't map the Input column to more than one parameter so I've been forced to create a copy of columnA and ColumnB as input columns so I can map to the extra paramters that the Command shape expects.

I also attempted to modify the command syntax so it set up variables for the 3 values required and then set the values to parameters - but I get a very unhelpful syntax error message: -
declare @ValueA varchar(50),
@ValueB varchar(50),
@ValueC varchar(50)
select @ValueA = ?,
@ValueB = ?,
@ValueC = ?,
update tableA
set columnA = @ValueA ,
column B = @ValueB
where columnC = @ValueC
AND (columnA != @ValueA OR columnB != @ValueB)



Any suggestions?