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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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Answer: True
Explanation:
Virtual memory is the secondary storage memory and this type of memory are addressed as main part of the memory.
When the virtual memory copying in the physical memory then, at that time the operating system divide the memory into the file page with the address and definite size number. Then, the each page are store in a disk.
When this page are required then, the operating system copy from disk to main memory and then, the virtual address are converted into the real address.
