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全部博文（487）
发布时间：2019-03-11 13:00:22
A. A non-deferrable PRIMARY KEYor UNIQUE KEYconstraint in a table automatically attempts to creates a unique index.C. When a table is dropped, the corresponding indexes are automatically dropped.Correct Answer: ACD......【阅读全文】
发布时间：2019-03-11 11:54:09
Name Null? TypeORDER_DATE NOT NULL DATECUSTOMER_ID NOT NULL NUMBER(6)Name Null? TypeCUST_FIRST_NAME NOT NULL VARCHAR2(20)CREDIT_LIMIT NUMBER(9,2)Which INSERT statement shoul.........【阅读全文】
发布时间：2019-03-11 11:15:09
A. GRANT CREATE VIEWuser1;TO PUBLIC;TO user1, user2;TO ALL;Section: (none)Explanation 解析：无 ALTER TABLE 系统权限......【阅读全文】
发布时间：2019-03-08 11:45:01
Which three statements indicate the end of a transaction? (Choose three.)B) after a SELECT statement is issuedD) after a SAVEPOINT is issuedAnswer：ACE......【阅读全文】
发布时间：2019-03-08 10:09:42
View the Exhibit and examine the structure of the Book table.Examine the commands executed and their outcome:1 row created.Savepoint created.101 rows deleted.Rollback complete.Rollback complete.A) The first rollback restores the 100 rows that were deleted and the second.........【阅读全文】
