SQL has no idea what upload is, 
 
You might be able to do 
 
dt = Data Table( "ServerData" ) << Join(
	With( Data Table( "DataProcessed" ) ),
	Merge Same Name Columns,
	Copy second table formula( 0 ),
	Suppress main table formula evaluation( 0 ),
	By Matching Columns( :Individual_Claim_Number_ID_Full = :Individual_Claim_Number_ID_Full ),
	Drop multiples( 0, 0 ),
	Name( "Include non-matches" )(0, 1),
	Preserve main table order( 1 ),
	Output Table( "Upload" )
);
dt << Save DataBase("Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=MAWA_REP;Data Source=USFLI-WAS101", "dbo.all_customers");
 
 
But I'm pretty sure that would actually overwrite your sql table.  
 
You could write the sql dymanically.  Just for through your table to put in all the values into a SQL string that you can then run. 
 
INSERT INTO [dbo].[ALL_CUSTOMERS]
           (col1, col2)
     VALUES
           (col1_value1, col2_value1), 
           (col1_value2, col2_value2),