[单选] Which SQL statement defines the FOREIGN KEY constraint on the DEPTNO column of the EMP table? （）

A . CREATE TABLE EMP (empno NUMBER(4), ename VARCNAR2(35), deptno NUMBER(7,2) NOT NULL CONSTRAINT emp_deptno_fk FOREIGN KEY deptno REFERENCES dept deptno);
B . CREATE TABLE EMP (empno NUMBER(4), ename VARCNAR2(35), deptno NUMBER(7,2) CONSTRAINT emp_deptno_fk REFERENCES dept (deptno));
C . CREATE TABLE EMP (empno NUMBER(4) ename VARCHAR2(35), deptno NUMBER(7,2) NOT NULL, CONSTRAINT emp_deptno_fk REFERENCES dept (deptno) FOREIGN KEY (deptno));
D . CREATE TABLE EMP (empno NUMBER(4), ename VARCNAR2(35), deptno NUMBER(7,2) FOREIGN KEY CONSTRAINT emp deptno fk REFERENCES dept (deptno))

A customer needs a test bed server to run 64-bit modeling， simulation， and other technical applications which require 2-way processors and 6GB RAM in a clustered mode. They also indicated that this server might be used to run 32-bit applications. Which of the following servers should be recommended to meet the requirements at the least cost？（） e326。 x460。 x306。 x236。债券评估时的风险报酬率，其高低与（）有关。投资者的竞争能力。发行者的竞争能力。投资者的财务能力。发行者的财务能力。 What IBM resource helps to easily identify a business application that has been validated on IBM Systems？（） NOTE： Solutions that are in this resource represent applications that enable IBM Systems and verify， through customer experience， installing and running in a customer location. IBM Standalone Solutions Configuration Tool （SSCT）。 IBM Server Proven。 IBM System x Reference Sheets （xREF）。 IBM Sizing Guide。 A customer wants to run VMWare ESX on an x445 with a large number of virtual machines running Windows 2003 Server as a Disaster Recovery （DR） Site for the production environment. Which of the following questions would most impact the memory configuration？（） What version of VMWare ESX Server is being considered？。 Do the systems currently use Double Data Rate （DDR） memory？。 What is the total number of processors installed in the production systems？。 What is the total amount of memory currently being used across all the production systems？。大体积混凝土运输过程中出现离析或使用外加剂进行调整时，搅拌运输车应进行快速搅拌，搅拌时间应不小于（）s。 30。 60。 90。 120。 Which SQL statement defines the FOREIGN KEY constraint on the DEPTNO column of the EMP table? （）

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[单选] Which SQL statement defines the FOREIGN KEY constraint on the DEPTNO column of the EMP table? （）

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