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weeeeeb [17]
3 years ago
14

Create a VBScript script (w3_firstname_lastname.vbs) that takes one parameter (folder name) to do the following 1) List all file

s names, size, date created in the given folder 2) Parameter = Root Folder name The script should check and validate the folder name 3) Optionally, you can save the list into a file “Results.txt” using the redirection operator or by creating the file in the script. 4) Make sure to include comment block (flowerbox) in your code.
Computers and Technology
1 answer:
leva [86]3 years ago
4 0

Answer:

Set args = Wscript.Arguments

If (WScript.Arguments.Count <> 1) Then

 Wscript.Echo "Specify the folder name as a command line argument."

Else

   objStartFolder = args.Item(0)

   Set objFSO = CreateObject("Scripting.FileSystemObject")

   if (Not objFSO.FolderExists(objStartFolder)) Then

       Wscript.Echo "Folder "&objStartFolder&" does not exist"

   Else

       Set objFolder = objFSO.GetFolder(objStartFolder)

       Set colFiles = objFolder.Files

       For Each objFile in colFiles

           Wscript.Echo objFile.Name, objFile.Size, objFile.DateCreated

       Next

   End If

End If

Explanation:

Here's some code to get you started.

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[1] Please find all the candidate keys and the primary key (or composite primary key) Candidate Key: _______________________ Pri
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Answer:

Check the explanation

Explanation:

1. The atomic attributes can't be a primary key because the values in the respective attributes should be unique.

So, the size of the primary key should be more than one.

In order to find the candidate key, let the functional dependencies be obtained.

The functional dependencies are :

Emp_ID -> Name, DeptID, Marketing, Salary

Name -> Emp_ID

DeptID -> Emp_ID

Marketing ->  Emp_ID

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Closure of attribute { Name , Date_Completed } is { Name, Date_Completed , Emp_ID , DeptID, Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { DeptID, Date_Completed } is { DeptID, Date_Completed , Emp_ID,, Name, , Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { Marketing, Date_Completed } is { Marketing, Date_Completed , Emp_ID,, Name, DeptID , Salary, Course_Name, Course_ID}.

So, the candidate keys are :

{ Emp_ID, Date_Completed }

{ Name , Date_Completed }

{ DeptID, Date_Completed }

{ Marketing, Date_Completed }

Only one candidate key can be a primary key.

So, the primary key chosen be { Emp_ID, Date_Completed }..

2.

The functional dependencies are :

Emp_ID -> Name, DeptID, Marketing, Salary

Name -> Emp_ID

DeptID -> Emp_ID

Marketing ->  Emp_ID

Course_ID -> Course Name

Course_Name ->  Course_ID

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For a relation to be in 2NF, there should be no partial dependencies in the set of functional dependencies.

The first F.D. is

Emp_ID -> Name, DeptID, Marketing, Salary

Here, Emp_ID -> Salary ( decomposition rule ). So, a prime key determining a non-prime key is a partial dependency.

So, a separate table should be made for Emp_ID -> Salary.

The tables are R1(Emp_ID, Name, DeptID, Marketing, Course_ID, Course_Name, Date_Completed)

and R2( Emp_ID , Salary)

The following dependencies violate partial dependency as a prime attribute -> prime attribute :

Name -> Emp_ID

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The following dependencies violate partial dependency as a non-prime attribute -> non-prime attribute :

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Course_Name ->  Course_ID

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The functional dependency Date_Completed -> Course_Name has a partial dependency as a prime attribute determines a non-prime attribute.

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The functional dependencies in R1(Emp_ID, Name, DeptID, Marketing, Date_Completed) is :

Emp_ID -> Name, DeptID, Marketing

This violates the transitive property. So, no table is created.

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Emp_ID -> Salary

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Course_Name   ->  Course_ID

Here there is a transitive dependency as a non- prime attribute ( Course_Name ) is determining a non-attribute ( Course_ID ).

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R2 (  Emp_ID , Salary) with candidate key Emp_ID.

R3 (Date_Completed, Course_Name ) with candidate key Date_Completed.

R4 ( Course_Name, Course_ID ).  with candidate keys Course_Name and Course_ID.

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