Examine the structure of the EMPLOYEES and DEPARTMENTS tables: EMPLOYEESColumn name Data type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2 (30) JOB_ID VARCHAR2 (20) SALARY NUMBER MGR_ID NUMBER References EMPLOYEE_ID COLUMN DEPARTMENT ID NUMBER Foreign key to DEPARTMENT ID column of the DEPARTMENTS table DEPARTMENTSColumn name Data type Remarks DEPARTMENT_ID NUMBER NOT NULL, Primary Key DEPARTMENT_NAME VARCHAR2(30) MGR_ID NUMBER References MGR_ID column of the EMPLOYEES table Evaluate this SQL statement: SELECT employee_id, e.department_id, department_name, salary FROM employees e, departments d WHERE e. department_id = d.department_id; Which SQL statement is equivalent to the above SQL statement? ()
第1题:
A.
B.
C.
D.
第2题:
A.
B.
C.
D.
第3题:
A.
B.
C.
D.
第4题:
当()时,货币贬值使该国国际收支状况恶化。
A:|ex+em|>1
B:|ex+em|=1
C:|ex+em|<1
D:|ex+em|≤1
第5题:
第6题:
正弦交流电的电动势最大值Em电动势有效值E之间的关系为()。
第7题:
对优等商品需求的收入弹性(Em)是()
第8题:
下列哪些项属于PLC的数字量输入输出扩展模块()
第9题:
指令EXEMP.RP=ALL,EM=ALL;输出的数据包括哪些?()
第10题:
劣等商品需求的收入弹性是()。
第11题:
displaying the total order value for sales representatives 161 and 163
displaying the order total for sales representative 161 in the year 1999
displaying the number of orders that have order mode online and order date in 1999
displaying the number of orders whose order total is more than the average order total for all online orders
第12题:
completes a transaction on a table
modifies the structure and data in a table
modifies the data but not the structure of a table
modifies the structure but not the data of a table
第13题:
A. You have no rows in the table.
B. You have an employee with the name of James.
C. You cannot roll back to the same savepoint more than once.
D. Your last update fails to update any rows because employee ID 180 was already eleted.
第14题:
A.
B.
C.
D.
第15题:
A.
B.
C.
D.
第16题:
下面四项,合法的电子邮件地址是()。
A.wang-em.info.net
B.em.info.net-wang
C.em.info.net@wang
D.wang@em.info.net
第17题:
对劣质商品需求的收入弹性(Em)是()。
第18题:
慢代谢者(PM),快代谢者(EM),快代谢者又分为纯合子EM和杂合子EM,在相同剂量下,他们体内血药浓度比较()
第19题:
$(“div”).find(“em”;)与下面哪句功能一致?()
第20题:
强调显示标记<em></em>
第21题:
在匹配的em元素中筛选出第二个em?()
第22题:
需求收入弹性Em的取值为多少的时候商品是奢侈品?()
第23题:
$(em).eq(-2)
$(em).eq(2)
$(em).eq(0)
$(em).eq(1)
第24题:
$(div>em)
$(div em)
$(div).has(em)
$(div).children().is(em)