ALTER TABLE `vn`.`payrollWorkCenter` DROP PRIMARY KEY; ALTER TABLE `vn`.`payrollWorkCenter` DROP COLUMN `empresa_id__`; ALTER TABLE `vn`.`payrollWorkCenter` DROP COLUMN `Centro__`; ALTER TABLE `vn`.`payrollWorkCenter` DROP COLUMN `nss_cotizacion__`; ALTER TABLE `vn`.`payrollWorkCenter` DROP COLUMN `domicilio__`; ALTER TABLE `vn`.`payrollWorkCenter` DROP COLUMN `poblacion__`; ALTER TABLE `vn`.`payrollWorkCenter` DROP COLUMN `cp__`; ALTER TABLE `vn`.`payrollWorker` DROP COLUMN `nss__`; ALTER TABLE `vn`.`payrollWorker` DROP COLUMN `codpuesto__`; ALTER TABLE `vn`.`payrollWorker` DROP COLUMN `codcontrato__`; ALTER TABLE `vn`.`payrollWorker` DROP COLUMN `FAntiguedad__`; ALTER TABLE `vn`.`payrollWorker` DROP COLUMN `codcategoria__`; ALTER TABLE `vn`.`payrollWorker` DROP COLUMN `ContratoTemporal__`;