I am not a user of Teradata but a quick search of SAS support confirms that the default behaviour of Teradata for updates is one row at a time. Suggest you try the DBCOMMIT = option to get Teradata to commit your updates say every 1,000 or 10,000 rows. Also suggest you investigate the Teradata MULTILOAD capability, This will not only improve update performance it will probably reduce query log entries. Check also with your DBA to see if there is a Teradata option for switching off the log messages.