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Need for Client Server Computing-Client/Server (C/S) architecture includes running the application on multiple machines in which every machine with its component software tackles only a part of the job. Client machine is mainly a PC or a workstation that gives presentation services & the appropriate computing, connectivity & interfaces while the server machine gives database services, connectivity & computing services to multiple users. Both client machines & server machines are connected to the similar network. While the number of users grows, client machines can be added to the network whereas as the load on the database server enhances more servers can be connected by the network. Therefore, client-server combination is a scalable combination. Server machines are more powerful machines database services to multiple client requests.
The client-server systems are connected by the network. This network require not only be the Local Area Network (LAN). It can also be the Wide Area Network across multiple cities. The client & server machines communicate by standard application program interfaces (known as API), and remote procedure calls (RPC). The language by which RDBMS based C/S environment communicate is the structured query language (SQL).
It defines that the tuple in one relation that refers to another relation must refer to an existing tuple in that relation. This constraint is states on two relations (not essentia
#questiRegional Gardens has many nurseries, including Wagga Wagga, Bathurst, Albury, Orange, and Dubbo. Each nursery is known by its campus code, eg WW, B, A, O and D respectively.
Explain trivial dependency? Functional dependency of the form α ->β. is trivial if α C β. Trivial functional dependencies are satisfied by all the relations.
Do the 11.1 11.1 Credit Card Use. Consider the following hypothetical bank data on consumers’ use of credit card credit facilities in Table 11.3. Create a small worksheet in Exce
Define upgrade and downgrade? It gives a mechanism for conversion from shared lock to exclusive lock is called as upgrade. It gives a mechanism for conversion from exclusive
Advantages of Data Distribution The primary benefit of distributed database systems is the ability to access and share data in a reliable and efficient manner.
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
What is the aim of logical schema ? The main motive of the logical schema is to ensure the portability of procedures and models on various physical schemas at runtime.
Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pictori
why shadow copy technique is used?
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