ALTER TABLE `dc_product`  ADD `SNOMEDCode` VARCHAR(100) NULL AFTER `ProductName`, ADD `Invalid` BOOLEAN NOT NULL DEFAULT FALSE AFTER `SNOMEDCode`, ADD `LastAutoUpdated` DATETIME NULL AFTER `Invalid`; 

ALTER TABLE `dc_errors` ADD INDEX(`ErrorDate`, `Deleted`); 
ALTER TABLE `dc_errors_dropdown` ADD INDEX(`ErrorID_LNK`); 