The SQL is used to change a table's structure by:
The use of the SQL ALTER TABLE command.
<h3>How is it done?</h3>
The SQL ALTER TABLE command is known to be that which is often used to alter the structure of an existing table.
It is known to help one to be able to add or delete columns, make or destroy indexes, alter the kinds of existing columns, rename columns or the table itself.
Note that It can also be used to alter the comment for any kind of table and type of the table therein.
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B. Completely describe your entire thought process
A <u>Virtual hard disk</u> is a specially formatted file that, once mounted, or connected to a virtual machine appear and operate pretty much identically to a physical hard drive.
<h3>What is a virtual hard disk?</h3>
A virtual hard disk (VHD) is a disk picture file format for storing the entire ranges of a computer's hard drive.
The disk image, sometimes called a virtual machine (VM), duplicates an existing hard drive, including all data and structural elements.
<h3>Why would you count a virtual hard disk?</h3>
Typically, a VHD comes in handy to add additional storage to a Hyper-V virtual machine, and thanks to its capacity to support other OS installations, you can even use this storage virtualization technology to make a dual-boot system without modifying an existing partition.
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Answer:
void swapints(int *j,int *k)//Function definition.
{
*j=*j+*k-(*k=*j); //value swapping.
}
swapints(&j,&k);//call the function.
Explanation:
- The above function definition takes the address of j and k variables which is stored on the pointer variable j and k.
- Then the pointer variable uses the j and k value for the above expression, and the user does not need to return the value of j and k.
- But when the user prints the value of the j and k variable, then he gets the swapping value of the j and k variable.
- The user needs to know that the "int j" is a normal variable, but "int *j" is a pointer variable that is used to take the address of j variable.
The answer to this would be B
