Examine the command that is used to create a table:
SQL> CREATE TABLE orders ( oid NUMBER(6) PRIMARY KEY, odate DATE, ccode NUMBER (6), oamt NUMBER(10,2) ) TABLESPACE users;
Which two statements are true about the effect of the above command? (Choose two.)
A. A CHECK constraint is created on the OID column.
B. A NOT NULL constraint is created on the OID column.
C. The ORDERS table is the only object created in the USERS tablespace.
D. The ORDERS table and a unique index are created in the USERS tablespace.
E. The ORDERS table is created in the USERS tablespace and a unique index is created on the OID column in the SYSTEM tablespace.
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