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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'.
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
How are tables stored on Disk? We realise that every record of a table can have different amounts of data. This is due to in some records; some attribute values may be "zero".
Enumerate or state the steps in creating a relevant database of a shop.
Different stages of DDLC ?
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
A database is a set of data. But, is the data kept in a database trustworthy? To answer that query we must first answer the question. What is integrity? Integrity simply means t
Explain Strict Two-Phase locking A transaction T does not release any type of its exclusive (X) locks until that transaction commits or aborts. In this method no other transact
Which method of access uses key transformation? A Hash method of access uses key transformation.
What type of view of total database content? Data base content Conceptual view of total database contain.
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