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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.
Why, generally does an object-oriented system use the relational DBMS? The reasons for using relational DBMS for OO systems could be any combination of following: a. Many or
A domain is a set of permissible values that can be given to an attribute. So each attribute in a table has a definite domain. Values to these attributes cannot be assigned outside
Write A short note on temporary tables? Temporary Tables - Temporary tables exists solely for a particular session, or whose data persists for the duration of the transaction
Define the terms i) Entity set ii) Relationship set Entity set: The set of all entities of the similar type is termed as an entity set. Relationship set: The set of all rela
Modular growth: In distributed environments, it is simple to expand. Latest sites can be added to the network without affecting the operations of other sites, as they are somewhat
Enumerate or state the steps in creating a relevant database of a shop.
Multiple column Queries: Syntax: SELECT COLUMN1, COL2,...... FROM TABLE WHERE (COLUMN1, COL2, ...) IN (SELECT COLUMN1, COL2,.... FROM TABLE WHERE );
Define the terms i) Key attribute ii) Value set Key attribute: An entity type usually has an attribute whose values are exact from each individual entity in the collection. Su
Explain the Natural join Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinati
Create 1 experiment to demonstrate an aspect of query optimisation by using access-path structures (indexes), decomposition, or denormalisation. Once satisfied with your experiment
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