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Why containment is important in oosystems?
Containment is an significant concept in oosystems because it allows dissimilar users to view data at different granularities.
what is correlation in nested query
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
Consider the two relations given below Given that A is the primary key of R, D is the primary key of S and there is a referential integrity among S.A and R.A, discuss all
Using Relational Algebra which query finds customers, who have a balance of over 1000 ? Using Relational Algebra Π Customer_name( σ balance >1000(Deposit)) is query to find cu
Describe Specialsation and generalization? Specialisation /generalization: This is a top down and bottom up approach to the design of database. It displays the IS_A relation
Project Description: Critical Project for VMware Technical support. VMWare ESXi 5.1 support for upgradation and migration problem. Technical expert of Vmware needed. Sk
notes about update opreation
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
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