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Nonamiya [84]
3 years ago
10

Give your definition of a view. Based on the Academic Database, identify and describe a scenario where it would be necessary to

use a view. Your answer should be addressed in 100 to 150 words.
Computers and Technology
1 answer:
il63 [147K]3 years ago
7 0

Answer:

A database view is a searchable object in a database that is defined by a query. Though a view doesn't store data, some refer to a views as “virtual tables,” you can query a view like you can a table. A view can combine data from two or more table, using joins, and also just contain a subset of information.

Explanation:

A database view is a subset of a database that is based on a query that runs on one or more database tables. Database views are saved in the database as named queries and can be used to save complete queries that are frequently used.

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boyakko [2]

Answer:

Option 1: May crash at runtime because it can input more elements than the array can hold

Explanation:

Given the code as follows:

  1.        int[] a = {1, 3, 7, 0, 0, 0};
  2.        int size = 3, capacity = 6;
  3.        int value = cin.nextInt();
  4.        while (value > 0)
  5.        {
  6.            a[size] = value;
  7.            size++;
  8.            value = cin.nextInt();
  9.        }

From the code above, we know the <em>a</em> is an array with six elements (Line 1). Since the array has been initialized with six elements, the capacity of the array cannot be altered in later stage.

However, a while loop is created to keep prompting for user input an integer and overwrite the value in the array started from index 3 (Line 4- 9). In every round of loop, the index is incremented by 1 (Line 7). If the user input for variable <em>value</em> is always above zero, the while loop will persist.  This may reach a point where the index value is out of bound and crash the program. Please note the maximum index value for the array is supposedly be 5.  

8 0
3 years ago
A startup disk cannot be detected when booting a computer. The disk's pressence is reported by the system firmware, But Windows
olasank [31]

Answer:

Bootrec.exe

Explanation:

The process of turning on a computer system is called booting. When a computer system boots, it runs the post test and loads into memory, the information or program needed to run the operating system, and then locates the operating system from the boot manager record in the disk partitions. When the disk is failed to be recorded, or the boot manager or sector is corrupt or lost, the bootrec.exe command is used in the command prompt to correct these problems.

8 0
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pishuonlain [190]
<span>So if some access your computer and erased some data without your permission or knowing then this threat is called as security threat. So you should have these stand alone systems with username and password concept that would protect your sensitive and private data and have the control over your computer.</span>
4 0
3 years ago
How do you strike through text in excel?
Valentin [98]
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6 0
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A small workgroup inherits a second-hand printer without networking capabilities. Which of the following is the BEST method of s
butalik [34]
Answer: c

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