A. SYSDATE cannot be used with the CHECK constraint.
B. The BETWEEN clause cannot be used for the CHECK constraint.
C. The CHECK constraint cannot be placed on columns having the DATE data type.
D. ORD_NO and ITEM_NO cannot be used as a composite primary key because ORD_NO is also the FOREIGN KEY.来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/17013648/viewspace-1157924/ ,如需转载,请注明出处,否则将追究法律责任。