ALTER TABLE `invoicebase` 
ADD COLUMN `IsReviewed` tinyint NULL DEFAULT 0 AFTER  `Type`,
ADD COLUMN `IsSent` tinyint NULL DEFAULT 0 AFTER  `IsReviewed`,
ADD COLUMN `IsExported` tinyint NULL DEFAULT 0 AFTER  `IsSent`,
ADD COLUMN `PartialPayment` VARCHAR(512) NULL DEFAULT NULL AFTER `IsPaid`;