试题详情
- 单项选择题Which syntax turns an existing constraint on?()
A、ALTER TABLE table_name ENABLE constraint_name;
B、ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint_name;
C、ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;
D、ALTER TABLE table_name STATUS ENABLE CONSTRAINT constraint_name;
E、ALTER TABLE table_name TURN ON CONSTRAINT constraint_name;
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