ALTER TABLE SERVER ADD (
  IS_WINDOWS VARCHAR2(1) NULL
)
/
ALTER TABLE SERVER ADD CONSTRAINT CKC_SERVER_IS_WINDOWS CHECK (IS_WINDOWS IN ('Y','N'))
/
ALTER TABLE PRODUCT_FILES ADD (
  IS_WINDOWS VARCHAR2(1) NULL
)
/
ALTER TABLE PRODUCT_FILES ADD CONSTRAINT CKC_PRODUCT_FILES_IS_WINDOWS CHECK (IS_WINDOWS IN ('Y','N'))