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Drawbacks of Data Distribution:The primary drawbacks of distributed database systems are the added complexity needed to ensure proper coordination between the sites. This increased difficulty takes the form of:
Higher Software development cost: Distributed database systems are difficult to execute and, therefore, more costly. Increased difficulty implies that we can expect the procurement and maintenance costs for a DDBMS to be higher than those for a centralised DBMS. In addition to software, a distributed DBMS needs additional hardware to establish a network among sites. There are ongoing communication costs incurred with the use of this network. There are also additional maintenance costs to handle and manage the local DBMSs and the network.
Explain the term - Adjustment of inheritance The inheritance can be enlarged as object design progresses by changing class structure. The designer should do: i) Adjust or r
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
What is a Transaction? A transaction is an event which happens on the database. Generally a transaction reads a value from the database or writes a value to the database. If y
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
Consider the relations: PROJECT(proj#,proj_name,chief_architect) EMPLOYEE(emp#,emp_name) ASSIGNED(proj#,emp#) Use relational algebra to express the subsequent queries: (i) Get
various techniques of hashing?
Which two tools are used to administer users for Active Directory?
What is RDBMS terminology for a row? A tuple is a RDBMS terminology for a row
explain equi-join using illustration
File Organisation In Dbms Introduction Databases are used to store information. Usually, the principal operations we have to perform on database are those relating to:
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