【OCP-12c】2019年CUUG OCP 071考试题库(79题)
79、Which statement is true about transactions?
A. A set of Data Manipulation Language (DML) statements executed in a sequence ending with a SAVEPOINT forms a single transaction.
B. Each Data Definition Language(DDL) statement executed forms a single transaction.
C. A set of DDL statements executed in a sequence ending with a COMMIT forms a single transaction.
D. A combination of DDL and DML statements executed in a sequence ending with a COMMIT forms a single transaction.
Correct Answer: B
Section: (none) Explanation:每个DDL语句都是一个事务,因为DDL语句执行后自动提交。如果A答案SAVEPOINT改为COMMIT或者ROLLBACK那么就是正确的。
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