OCP-1Z0-051 第174題 事務的組成
A. A transaction can consist only of a set of DML and DDL statements.
B. A part or an entire transaction can be undone by using ROLLBACK command.
C. A transaction consists of a set of DML or DCL statements.
D. A part or an entire transaction can be made permanent with a COMMIT.
E. A transaction can consist of only a set of queries or DML or DDL statements.
答案：B
(C選項，題庫答案中有，但是我在做測試的時候，不正確，如果有朋友有其它意見可以討論)
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