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Which two statements are true regarding the USING and ON cla

题目
多选题
Which two statements are true regarding the USING and ON clauses in table joins?（）
A

Both USING and ON clauses can be used for equijoins and nonequijoins

B

Amaximum of one pair of columns can be joined between two tables using the ON clause

C

The ON clause can be used to join tables on columns that have different names but compatible data types

D

The WHERE clause can be used to apply additional conditions in SELECT statements containing the ON or the USING clause

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相似问题和答案

第1题：

You want to analyze a SQL Tuning Set (STS) using SQL Performance Analyzer in a test database. Which two statements are true regarding the activities performed during the test execution of SQLs in a SQL Tuning Set?（）

A.Every SQL statement in the STS is considered only once for execution

B.The SQL statements in the STS are executed concurrently to produce the execution plan and execution statistics

C.The execution plan and execution statistics are computed for each SQL statement in the STS

D.The effects of DDL and DML are considered to produce the execution plan and execution statistics


参考答案：A, C

第2题：

Which two statements are true regarding L2TP? ()(Choose two.)

A. Tunnels are initiated by the LAC

B. Tunnels are initiated by the LNS

C. By default, subscriber authentication occurs on the LNS

D. By default, subscriber authentication occurs on the LAC


参考答案：A, C

第3题：

Which two statements regarding a SQL profile are true?()

A. It is built by Automatic Tuning Optimizer.

B. It cannot be stored persistently in the data dictionary.

C. It can be used by the query optimizer automatically.

D. It can be created manually by using the CREATE PROFILE command.


参考答案：A, C

第4题：

Which two statements are true regarding high-availability chassis clustering？（）

  • A、A chassis cluster consists of two devices.
  • B、A chassis cluster consists of two or more devices.
  • C、Devices participating in a chassis cluster can be different models.
  • D、Devices participating in a chassis cluster must be the same models

正确答案:A,D

第5题：

Which two statements are true regarding the role of the Routing Engine (RE)?（）

  • A、The RE controls and monitors the chassis.
  • B、The RE manages the Packet Forwarding Engine (PFE).
  • C、The RE receives a copy of the forwarding table from the forwarding plane.
  • D、The RE implements class of service (COS).

正确答案:A,B

第6题：

Which two statements regarding symmetric key encryption are true?() (Choose two.)

A. The same key is used for encryption and decryption.

B. It is commonly used to create digital certificate signatures.

C. It uses two keys: one for encryption and a different key for decryption.

D. An attacker can decrypt data if the attacker captures the key used for encryption.


参考答案：A, D

第7题：

Which two statements are true regarding rescue configurations?()

A. Once saved, a rescue configuration is loaded using the rollback 0 command.

B. The rescue configuration must contain the minimal elements necessary to restore network connectivity.

C. A minimal rescue configuration is defined by default.

D. A rescue configuration must include a root password.


参考答案：B, D

第8题：

Which two statements are true regarding the starting of the database instance using the following command?()SQL>STARTUP UPGRADE

A. It enables all system triggers.

B. It allows only SYSDBA connections.

C. It ensures that all job queues remain active during the upgrade process.

D. It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.


参考答案：B, D

第9题：

Which two statements are true about using the isUserInRole method to implement security in a Java EEapplication？（）

  • A、It can be invoked only from the doGet or doPost methods.
  • B、It can be used independently of the getRemoteUser method.
  • C、Can return "true" even when its argument is NOT defined as a valid role name in the deployment descriptor.
  • D、Using the isUserInRole method overrides any declarative authentication related to the method in which it is invoked.

正确答案:B,C

第10题：

Which two statements are true regarding L2TP? （）(Choose two.)

  • A、Tunnels are initiated by the LAC
  • B、Tunnels are initiated by the LNS
  • C、By default, subscriber authentication occurs on the LNS
  • D、By default, subscriber authentication occurs on the LAC

正确答案:A,C

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