多选题Which two statements about creating constraints are true?（）AConstraint names must start with SYS_CBAll constraints must be defines at the column levelCConstraints can be created after the table is createdDConstraints can be created at the same time the table is createdEInformation about constraints is found in the VIEW_CONSTRAINTS dictionary view
多选题
Which two statements about creating constraints are true?（）
A
Constraint names must start with SYS_C
B
All constraints must be defines at the column level
C
Constraints can be created after the table is created
D
Constraints can be created at the same time the table is created
E
Information about constraints is found in the VIEW_CONSTRAINTS dictionary view
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