单选题What is true regarding subqueries?（）A The inner query always sorts the results of the outer queryB The outer query always sorts the results of the inner queryC The outer query must return a value to the outer queryD The inner query returns a value to t

题目
单选题
What is true regarding subqueries?（）
A

The inner query always sorts the results of the outer query

B

The outer query always sorts the results of the inner query

C

The outer query must return a value to the outer query

D

The inner query returns a value to the outer query

E

The inner query must always return a value or the outer query will give an error

相似考题

1.Examine the data from the ORDERS and CUSTOMERS tables.Evaluate the SQL statement:What is the result when the query is executed?()A.B.C.D. The query fails because the subquery returns more than one row.E. The query fails because the outer query and the inner query are using different tables.

2.使用Inner Outer Key特效时，最多可以设定（）Cleanup Foreground和Cleanup Background。

3.Which statements concerning the correlation between the inner and outer instances of non-static inner classes are true？（）  A、Member variables of the outer instance are always accessible to inner instances， regardless of their  accessibility modifiers.B、Member variables of the outer instance can never be referred to using only the variable name within  the inner instance.C、More than one inner instance can be associated with the same outer instance.D、All variables from the outer instance that should be accessible in the inner instance must be declared  final.E、A class that is declared final cannot have any inner classes.

4.以下程序的调试结果为?public class Outer{public String name = "Outer";public static void main(String argv[]){Inner i = new Inner();i.showName();}private class Inner{String name =new String("Inner");void showName(){System.out.println(name);}}}A.输出结果 OuterB.输出结果 InnerC.编译错误，因Inner类定义为私有访问D.在创建Inner类实例的行出现编译错误

更多“单选题What is true regarding subqueries?（）A The inner query always sorts the results of the outer queryB The outer query always sorts the results of the inner queryC The outer query must return a value to the outer queryD The inner query returns a value to t”相关问题

  • 第1题：

    1. public class Outer{  2. public void someOuterMethod（） {  3. // Line 3  4. }  5. public class Inner{}  6. public static void main（ String[]argv ） {  7. Outer o = new Outer（）；  8. // Line 8  9. }  10. }  Which instantiates an instance of Inner？（）  

    • A、 new Inner（）； // At line 3
    • B、 new Inner（）； // At line 8
    • C、 new o.Inner（）； // At line 8
    • D、 new Outer.Inner（）； // At line 8

    正确答案:A

  • 第2题：

    Which thefollowingstatements about static inner classes is true？（）

    • A、 An anonymous class can be declared as static.
    • B、 A static inner class cannot be a static member of the outer class.
    • C、 A static inner class does not require an instance of the enclosing class.
    • D、 Instance member of a static inner class can be referenced using the class name of the staticinner class.

    正确答案:C

  • 第3题：

    package foo； public class Outer （  public static class Inner （  ）  ）   Which statement is true？ （） 

    • A、 An instance of the Inner class can be constructed with “new Outer.Inner （）”
    • B、 An instance of the inner class cannot be constructed outside of package foo.
    • C、 An instance of the inner class can only be constructed from within the outer class.
    • D、 From within the package bar， an instance of the inner class can be constructed with “new inner（）”

    正确答案:A

  • 第4题：

    Which statements about static inner classes are true？（）

    • A、 A static inner class requires a static initializer.
    • B、 A static inner class requires an instance of the enclosing class.
    • C、 A static inner class has no reference to an instance of the enclosing class.
    • D、 A static inner class has access to the non-static members of the outer class.
    • E、 Static members of a static inner class can be referenced using the class name of the static inner  class.

    正确答案:C,E

  • 第5题：

    class Birds {  public static void main（String [] args） {  try {  throw new Exception（）；  } catch （Exception e） { try {  throw new Exception（）；  } catch （Exception e2） { System.out.print（"inner "）； }  System.out.print（"middle "）； }  System.out.print（"outer "）；  }  }  结果为：（）  

    • A、inner
    • B、inner outer
    • C、middle outer
    • D、inner middle outer

    正确答案:D

  • 第6题：

    What is true regarding subqueries?（）

    • A、The inner query always sorts the results of the outer query.
    • B、The outer query always sorts the results of the inner query.
    • C、The outer query must return a value to the inner query.
    • D、The inner query returns a value to the outer query.
    • E、The inner query must always return a value or the outer query will give an error.

    正确答案:D

  • 第7题：

    单选题
    1. public class Outer{  2. public void someOuterMethod（） {  3. // Line 3  4. }  5. public class Inner{}  6. public static void main（ String[]argv ） {  7. Outer o = new Outer（）；  8. // Line 8  9. }  10. }  Which instantiates an instance of Inner？（）
    A

     new Inner（）； // At line 3

    B

     new Inner（）； // At line 8

    C

     new o.Inner（）； // At line 8

    D

     new Outer.Inner（）； // At line 8


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    Which statement is true？（）
    A

     An anonymous inner class may be declared as final.

    B

     An anonymous inner class can be declared as private.

    C

     An anonymous inner class can implement multiple interfaces.

    D

     An anonymous inner class can access final variables in any enclosing scope.

    E

     Construction of an instance of a static inner class requires an instance of the enclosing outer class.


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    Which statement about static inner classes is true？ （）
    A

     An anonymous class can be declared as static.

    B

     A static inner class cannot be a static member of the outer class.

    C

     A static inner class does not require an instance of the enclosing class.

    D

     Instance members of a static inner class can be referenced using the class name of the static inner class.


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    What is true regarding subqueries?（）
    A

    The inner query always sorts the results of the outer query.

    B

    The outer query always sorts the results of the inner query.

    C

    The outer query must return a value to the inner query.

    D

    The inner query returns a value to the outer query.

    E

    The inner query must always return a value or the outer query will give an error.


    正确答案： D
    解析： 暂无解析

  • 第11题：

    多选题
    Which two statements are true regarding the execution of the correlated subqueries？（）
    A

    The nested query executes after the outer query returns the row.

    B

    The nested query executes first and then the outer query executes.

    C

    The outer query executes only once for the result returned by the inner query.

    D

    Each row returned by the outer query is evaluated for the results returned by the inner query.


    正确答案： C,B
    解析： 暂无解析

  • 第12题：

    单选题
    What is true regarding subqueries?（）
    A

    The inner query always sorts the results of the outer query

    B

    The outer query always sorts the results of the inner query

    C

    The outer query must return a value to the outer query

    D

    The inner query returns a value to the outer query

    E

    The inner query must always return a value or the outer query will give an error


    正确答案： C
    解析： 暂无解析

  • 第13题：

    package foo；  public class Outer {  public static class Inner {  }  }   Which statement is true？（） 

    • A、 Compilation fails.
    • B、 An instance of the Inner class can be constructed with “new Outer.Inner（）”.
    • C、 An instance of the Inner class cannot be constructed outside of package foo.
    • D、 An instance of the Inner class can be constructed only from within the Outer class.
    • E、 From within the package foo， and instance of the Inner class can be constructed with “new Inner（）”.

    正确答案:B

  • 第14题：

    下列连接中能自动删除重复的列是（）。

    • A、INNER JOIN
    • B、LEFT OUTER JOIN
    • C、RIGHT OUTER JOIN
    • D、FULL OUTER JOIN

    正确答案:A

  • 第15题：

    Which statement about static inner classes is true？ （） 

    • A、 An anonymous class can be declared as static.
    • B、 A static inner class cannot be a static member of the outer class.
    • C、 A static inner class does not require an instance of the enclosing class.
    • D、 Instance members of a static inner class can be referenced using the class name of the static inner class.

    正确答案:C

  • 第16题：

    Which statement is true？（）

    • A、 An anonymous inner class may be declared as final.
    • B、 An anonymous inner class can be declared as private.
    • C、 An anonymous inner class can implement multiple interfaces.
    • D、 An anonymous inner class can access final variables in any enclosing scope.
    • E、 Construction of an instance of a static inner class requires an instance of the enclosing outer class.

    正确答案:D

  • 第17题：

    What is true regarding subqueries?（）

    • A、The inner query always sorts the results of the outer query
    • B、The outer query always sorts the results of the inner query
    • C、The outer query must return a value to the outer query
    • D、The inner query returns a value to the outer query
    • E、The inner query must always return a value or the outer query will give an error

    正确答案:E

  • 第18题：

    Top N analysis requires （） and （）.

    • A、the use of rowid
    • B、a GROUP BY clause
    • C、an ORDER BY clause
    • D、only an inline view
    • E、an inline view and an outer query

    正确答案:C,E

  • 第19题：

    单选题
    package foo；  public class Outer {  public static class Inner {  }  }   Which statement is true？（）
    A

     Compilation fails.

    B

     An instance of the Inner class can be constructed with “new Outer.Inner（）”.

    C

     An instance of the Inner class cannot be constructed outside of package foo.

    D

     An instance of the Inner class can be constructed only from within the Outer class.

    E

     From within the package foo， and instance of the Inner class can be constructed with “new Inner（）”.


    正确答案： E
    解析： 暂无解析

  • 第20题：

    单选题
    While a ship with twin screw is making a turn, in order to prevent overload, the duty engineer should （）
    A

    reduce the fuel feeding of main engine of inner propeller

    B

    reduce the fuel feeding of main engine of outer propeller

    C

    firstly reduce the fuel of main engine of inner propeller, then reduce the fuel feeding of engine of outer propeller

    D

    reduce fuel feeding of two engines at the same time


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    package foo； public class Outer （  public static class Inner （  ）  ）   Which statement is true？ （）
    A

     An instance of the Inner class can be constructed with “new Outer.Inner （）”

    B

     An instance of the inner class cannot be constructed outside of package foo.

    C

     An instance of the inner class can only be constructed from within the outer class.

    D

     From within the package bar， an instance of the inner class can be constructed with “new inner（）”


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    EXHIBIT, Emp Table Exhibit A Exhibit B Examine the data from the EMP table. Evaluate this SQL statement: SELECT * FROM emp WHERE emp _ id = 3); WHERE commission = (SELECT commission FROM emp What is the result when the query is executed?（）
    A

    Exhibit A

    B

    Exhibit B 

    C

    The query returns no rows 

    D

    The query fails because the outer query is retrieving more than one column

    E

    The query fails because both the inner and outer queries are retrieving data from the same table.


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    Which thefollowingstatements about static inner classes is true？（）
    A

     An anonymous class can be declared as static.

    B

     A static inner class cannot be a static member of the outer class.

    C

     A static inner class does not require an instance of the enclosing class.

    D

     Instance member of a static inner class can be referenced using the class name of the staticinner class.


    正确答案： C
    解析： 暂无解析

  • 第24题：

    多选题
    Top N analysis requires （） and （）.
    A

    the use of rowid

    B

    a GROUP BY clause

    C

    an ORDER BY clause

    D

    only an inline view

    E

    an inline view and an outer query


    正确答案： E,A
    解析： 暂无解析

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