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Insulation between conceptual and physical structures
It can be defined as:
1. The Database Administrator should be capable to vary the storage structures without affecting users' views.
2. The internal structure of the database should be unaffected by the varies to the physical aspects of the storage, like changing to a new storage device.
3. The DBA should be able to vary the conceptual structure of the database without affecting all users.
Control Files : The redo and control files logs support the rest of the architecture. Every database must have at least one control file, although you have more than one to guard
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WHAT IS SQL
I need help with data warehousing and business intelligence course project about designing a data warehouse for a jewelry company that does not have one
Increased overheads on update : On the drawbacks side, it will need the system to ensure that all replicas of a relation are consistent. This shows that all the replicas of the rel
Have a look around the site, and at some of the sites they have featured. These are all examples of bad design, and also offer an explanation about why they fall into this category
The External or View Level The external or view level is the highest level of abstraction of database. It gives a window on the conceptual view, which permits the user to see
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
why shadow copy technique is used?
Hi is anyone well versed in accounting information systems available now to help me work through an important assignment due tomorrow at noon?
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