【12c OCP认证】2019年度OCP最新考试题库-071.88题
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88、Evaluate the following SELECTstatement and view the exhibit to examine its output:
SELECT constraint_name, constraint_type,
search_condition, r_constraint_name, delete_rule,
status, FROM user_constraints
WHERE table_name = 'ORDERS';
Which two statements are true about the output? (Choose two.)
A. The R_CONSTRAINT_NAMEcolumn gives the alternative name for the constraint.
B. In the second column, 'c' indicates a check constraint.
C. The STATUS column indicates whether the table is currently in use.
D. The column DELETE_RULE decides the state of the related rows in the child table when the corresponding row is deleted from the parent table.
Correct Answer: BD
Section: (none)
Explanation (R_CONSTRAINT_NAME 给出参考的约束的名字,而不是该约束的替代的名字)