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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 are the several forms of identity? a) Value b) Name c) Built-in
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Ask questiwhat is row indicator in database on #Minimum 100 words accepted#
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Order by clause By using this rows can be sorted It is used in the last portion of select statement By default it gets ascending order DESC: is used
What are the typical phases of query processing
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