Examine the structure of the EMP_DEPT_VU view:Column Name Type RemarksEMPLOYEE_ID NUMBER From the EMPLOYEES tableEMP_NAME VARCHAR2(30) From the EMPLOYEES table JOB_ID VARCHAR2(20) From the EMPLOYEES tableSALARY NUMBER From the EMPLOYEES tableDEPARTMENT_ID NUMBER From the DEPARTMENTS table DEPT_NAME VARCHAR2(30) From the DEPARTMENTS table Which SQL statement produces an error?()
A. SELECT * FROM emp_dept_vu;
B. SELECT department_id, SUM(salary) FROM emp_dept_vu GROUP BY department _ id;
C. SELECT department_id, job_id, AVG(salary) FROM emp_dept_vu GROUP BY department _ id, job_id;
D. SELECT job_id, SUM(salary) FROM emp_dept_vu WHERE department_id IN (10,20) GROUP BY job_id HAVING SUM (salary) > 20000
E. None of the statements produce an error; all are valid.
第1题:
1、现在需要对xml文档中所有的chapter元素排序后再利用for-each进行循环,要求排序依据为chapter下名为“no”的子元素,且按数值类型进行排序。能实现该功能的选项为()。
A.<for-each select="//chapter"> <sort data-type="number" select="//no" /> </for-each>###SXB###B.<for-each select="//chapter"> <sort data-type="number" select="/no" /> </for-each>###SXB###C.<for-each select="/chapter"> <sort data-type="number" select="no" /> </for-each>###SXB###D.<for-each select="第2题:
【多选题】设有以下两行HTML代码: 01 <input name="xm" type="text" /> 02 <input type="password" /> 下列哪些选择器仅可以选择01行标签
A.input{}
B.input[name]{}
C.input[type]{}
D.input[name=xm]{}
E.input[name*=xm]{}
第3题:
23、假定 number=4,下面哪个语句不会出错?
A.print(format(number, "2d"), format(number ** 1.5, "4d"))
B.print(format(number, "2d"), format(number ** 1.5, "4.2d"))
C.print(format(number, "2d"), format(number ** 1.5, "4.2f"))
D.print(format(number, "2f"), format(number ** 1.5, "4.2d"))
第4题:
现在需要对xml文档中所有的chapter元素排序后再利用for-each进行循环,要求排序依据为chapter下名为“no”的子元素,且按数值类型进行排序。能实现该功能的选项为()。
A.<for-each select="//chapter"> <sort data-type="number" select="//no" /> </for-each>
B.<for-each select="//chapter"> <sort data-type="number" select="/no" /> </for-each>
C.<for-each select="/chapter"> <sort data-type="number" select="no" /> </for-each>
D.<for-each select="//chapter"> <sort data-type="number" select="no" /> </for-each>
第5题:
2、下列定义函数的方法,在Python中正确的是()。
A.class<name>(<type> arg1,<type> arg2,…<type>argN)
B.function <name>(arg1,arg2,…argN)
C.def <name>(arg1,arg2,…argN)
D.def <name>(<type> arg1,<type> arg2,…<type>argN)
第6题:
52.在input元素的type属性中,用于表示单行文本框的属性是()
A.type=“text”
B.type=“password”
C.type=“radio”
D.type=“number”