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全部博文（487）
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】
发布时间：2019-03-08 09:37:48
Evaluate the following query:INTERVAL '54-2' YEAR TO MONTH,FROM dual;A) +25-00 , +00-650, +00 11:12:10.123457C) +00-300, +00-650, +00 11:12:10.123457Answer：BINTERVAL '300' MONTH：300 个月为+25-00(25 年，即 25*12+0)INTERVAL '11:12:10.1234567' HOUR TO SECOND: +00 11:12:1.........【阅读全文】
发布时间：2019-03-07 11:54:56
Which two statements are true? (Choose two.)B) The user SYSTEM owns all the base tables and user-accessible views of the data dictionary.D) The USER_OBJECTS view can provide information about the tables and views created by the user who queries the view.Answer：DEB. system 用户是操.........【阅读全文】
发布时间：2019-03-07 11:24:15
View the Exhibit and examine the structure of CUSTOMERS table.Evaluate the following query:FROM customerscust_credit_limit BETWEEN 5000 AND 15000 ANDcust_city NOT BETWEEN 'A' AND 'B';A) It executes successfully.C) It produces an error because conditions on the GUST_CREDIT_L.........【阅读全文】
