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Pavlova-9 [17]
2 years ago
14

(True/False). In an "ID" column with the data type INTEGER PRIMARY KEY, each value entered for the ID must be unique.

Computers and Technology
1 answer:
musickatia [10]2 years ago
5 0

Answer:

The answer is "True".

Explanation:

  • The key to a relational database that is unique for each data record is a primary key, also called a primary keyword.
  • This unique identifier, including a driver's license name, telephone number, or vehicle identification number. This is an identifier (VIN).
  • There must always be the only primary key in such a relational database.
  • This is a specific relational database field (or column combination) that identifies each table entry in a unique way.
  • It utilized it to swiftly analyze the data within the table as a unique identifier.
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The number of __________ to your website that had not visited prior to the time frame being analyzed.
liq [111]

Answer:

First Time Unique Visitor

Explanation:

I majored in

4 0
3 years ago
Assume the variable myWord references a string. Write a statement that uses a slicing
givi [52]

Answer:

"myWord[-5:]"

Explanation:

So whenever you slice a string, the syntax in python is expressed as:

string[a:b:c]

where a=start index (this is included in the sliced string)

b = end index (this is excluded from the sliced string)

c = increment

If any of these are included, they are set to default values, where a=0, b=len(string), and c=1.

The increment isn't necessary here, and it's just so you know the syntax a bit more

Anyways, I'm assuming when the question asks to display "the last 5 characters in the string" it means in order? e.g "abcdefghijk" -> "ghijk" and not "abcdefghijk" -> "kjihg"

The last piece of information to know is what a negative index represents.

For example if I have the piece of code

"

string = "hello world"

print(string[-1])

"

This will output "d", and the negative 1 represents the last letter. If you did -2, it would output the 2nd to last letter and so on.

So to print the last 5 characters, we simply use the -5 as the starting index.  

"

string = "hello world"

print(string[-5:])

"

This will print "world" or in other words, the last 5 letters. The reason for this is because the -5 in the first spot means the starting index is the 5th to last letter, and when you have the : after the -5, this is the way of telling python you're slicing the string, and not indexing 1 character. You don't need to include another value after that, because it will default to the last index of the string, or more specifically the last index + 1, since the last index is still included.

So the last thing to know, is that if the string isn't greater than 5 characters, it just prints the entire string, and no errors are raised. You can test this out your self as well. So whenever you have a string that's less than 5 characters the entire string is outputted.

3 0
1 year ago
An information system can enhance core competencies by
Nutka1998 [239]

Answer:

An information system can enhance core competencies by: encouraging the sharing of knowledge across business units.

Explanation:

Hope this helps you ! please mark me brainless

4 0
2 years ago
In the SDLC's third phase, the way in which a proposed information system will deliver the general abilities described in the pr
kifflom [539]

Answer: Detailed

Explanation:

SDLC consist of 7 phases. They are:

1. Planning.

2. System analysis and requirement

3. Design:

4. Coding:

5. Testing:

6. Installation

7. Maintenance

Here we are talking of the third phase. In this phase it is the design phase which consist of high and low level design. Here the preliminary design is included in high level design where it describes the required hardware, software, network capabilities and the modelling of the interface. However the detailed design in low level design will implement the coding and will finding of any errors in the implemented design as described by the preliminary design.

3 0
3 years ago
Consider the following methods:
elena55 [62]
3. 8.1  
Looking at the functions "average", and "mystery" it's pretty obvious that "average" returns a double precision average of the value of an integer array. The function "mystery" returns an array of integers with each value in the array being the length of the string in the array of strings passed to "mystery" in the same ordinal position.  
The main body of the code initializes an array of strings and then passes that array to "mystery" who's output is then passed into the function "average". Since the lengths of the words passed to "mystery" is 7, 5, 6, 10, 10, 8, 13, 6, 8, 8, the sum will be 81, so the average will be 81/10 = 8.1 which matches option "3".
4 0
3 years ago
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