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Primary keys have to be numbers that are entered by the user.

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Q: Do Primary keys have to be numbers that are entered by the user?
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Could you give and example of a user name with numbers and letters with an underscore?

john_doe44


Differences between primary data and secondary data?

Primary data is data that is collected by the researcher. Secondary data is information that has been collected by someone other than the user.


Using c plus plus when you ask user to press Y or N to continue even if you press any other letters aside from N it will continue How do you make it continue by only pressing Y?

Write a conditional that tests for the letter the user entered, if it is Y it continues, if it's not it exits.


Write a shell program to find given no is even or odd?

The pseudo code would be as follows (you figure out the syntax) 1) Prompt the user to enter a number 2) If entered number is alpha, quit program after displaying message that the user ended the program. 3) Otherwise, find Modulo 2 of the entered number. This is a fancy way of saying "find the remainder when the number is divided by 2) 4) If Modulo 2 is zero, the number is even, otherwise odd 5) Display message showing if the entered number was Even or Odd 6) Branch back to step 1


How would I add numbers input by a user one at a time into a vector in MATLAB I have the loop set up but don't know how to add the data into the vector?

First, make sure your vector is initialized outside of the loop. Then, within your loop you need to update the vector. If you want data entered by the user only, you should initialize with an empty vector. Example program (not sure which loop you're using, but I'll use a while loop here): vector=[]; user='y'; while user=='y' user=input('Enter another variable? Type y for yes and n for no: '); if user=='n' break end var=input('Please input variable: '); vector=[vector, var]; end The key part in this coding is the line: >> vector=[vector,var]; as this will update your vector with the previous vector values, and then add another value to the vector with whatever number var is. Hope this helps!

Related questions

How much types of keys are available in dbms?

There are five types of keys in database management system . The name of the five keys are as follows .:1) surrogate key -which is the system generated primary key .2) Primary key - same function as surrogate key but user defined.3) candidate key -combination of two more keys.4) alternate keys - alternative for candidate keys.5) foreign key - primary key of another table.There are five types of keys in database management system.These five keys are surrogate, primary, candidate, alternate, foreign keys .


Which AFMC agency is the primary user of engine inventory management data entered into the comprehensive engine management system?

Oklahoma City Air Logistics Center


What is computer kekboard?

Assuming you mean 'keyboard' - it's an input device for a user to give instructions to the computer. It consists of the numbers from 0 to 9, the letters from a to z, 12 function keys, and a number of special function keys.


Who is a primary user of the indicator approach of forecasting?

The U.S. government is a primary user of the indicator approach of forecasting.


How do you check specific value is entered by user or not?

not that much


Can an authorized user remove the primary user and become the primary user?

Absolutely not. Most banks don't even allow the authorized user to get basic info from the account, such as balance or recent transactions.


What is the router prompt when in USER EXEC mode?

Router> Which means the user has entered the EXEC mode of the router.


Are primary card holders credit affected by adding a user?

A Primary card holder's credit will not be impacted by adding an authorized user.


What is restricts the values that may be entered into a cell by the worksheet user?

Constraint


How to write a program that ask user to enter numbers until user enter- 0 then find the biggest of entered numbers in C programming using while or do while?

int i, largest=0;do { scanf ("Enter a number (0 to exit): %d", i); if (i>largest) largest=i; } while (i!=0); printf ("Largest number is: %d\n", largest);


What does invalid user name format mean?

It means that the program you are tying to log onto does not recognise the User Name you have entered. Enter the correct User name.


Which encryption protocol uses pre-share keys to authenticate user?

WPA