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With the help of a diagram defines the typical element modules of a DBMS?
The functional elements of a database system can be widely divided into: 1) Storage manager and 2) query processor
1) Storage manager components include:(i) Authorization and integrity manager to test integrity constraints and authorized access to data. (ii) Transaction manager to ensure in which database remains in a consistent state. (iii) File manager to manage disk storage space. (iv) Buffer manager is responsible for buffering data.
2) The query processor component includes: (i) DDL interpreter to interpret DDL statements (ii) DML compiler that translation DML queries into query evaluation plan for query evaluation engine. (iii) Query evaluation engine execute low level instructions produced through DML compiler.
Define the phases of two phase locking protocol Growing phase: a transaction may get locks but not release any lock. Shrinking phase: a transaction might be release locks bu
Express the subsequent query in SQL assumes which the data is stored within EMPLOYEE table with relevant fields (i) Display name, job, salary, and hire date of employee who are
Rearrange Classes and Operations Sometimes, the similar operation is defined across different classes and can easily be inherited from a familiar ancestor, but more often oper
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What is Foreign Key Foreign Key: Sometimes we may have to work with an attribute that does not have a primary key of its own. To recognize its rows, we have to use the primar
#what is cursor its uses ? Explain it
am looking for assignment helper for dbms
What is a Phantom Deadlock? In distributed deadlock detection, the delay in propagating local information might cause the deadlock detection algorithms to recognize deadlocks
For every n-ary relationship type R where n>2, we make a new table S to represent R. We contain as foreign key attributes in s the primary keys of the relations that show the parti
What kind of advantages to copying records from one table to another? -) When an algorithm that modifies a table is used after that it's safer to work with the copy -) When
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