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Describe Hashing in DBMS?
Hashing: Hashing is a technique to store data within an array so which storing, searching, inserting and deleting data is fast (in theory it's O(1)). For this every record requires an unique key.
The primary idea is not to find for the correct position of a record along with comparisons but to compute the position inside the array. The function which returns the position is known the 'hash function' and the array is called a 'hash table'.
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
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Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
how to operate database in access ?
recovey techniques based on deferred update and immediate update
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