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What are the three design goals for relational databases and explain why each is desirable.?
Wiki User
∙ 7y ago
- Data integrity: Ensuring that data stored in the database is accurate and consistent by enforcing constraints, such as unique keys and foreign keys, to prevent invalid data.
- Scalability: Allowing the database to efficiently handle growing amounts of data and user load by optimizing data storage, indexing, and query performance.
- Maintainability: Simplifying the process of database maintenance, updates, and modifications by using normalization, clear data modeling, and documenting database structures.
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What has the author H Kitagawa written?
H. Kitagawa has written: 'The unnormalized relational data model' -- subject(s): Database design, Relational databases
Is the relational database an example of oracle database?
A relational database is a type of database design. Oracle is a brand of database. You can create a relational database using Oracle. You can also create relational databases using other database applications.
Why do you learn database model?
It helps you to design a database. It is a theoretical idea of what it will be like. There are different models than can be used, such as relational or network or hierarchical. Some are better suited to some kinds of databases. Using the model helps people to design and build better databases.
What has the author Thomas Kyte written?
Thomas Kyte has written: 'Expert Oracle Database Architecture' 'Effective Oracle by design' -- subject(s): Database design, Oracle (Computer file), Relational databases
What has the author Steve Shiflett written?
Steve Shiflett has written: 'Working with Oracle cartridges' -- subject(s): Database design, Oracle (Computer file), Relational databases
Give two reasons why data servers may be popular for object-oriented databases but not for relational databases?
Data servers are popular for object-oriented databases because they provide greater flexibility in managing complex data structures, which are commonly used in object-oriented programming. Object-oriented databases often require specific server capabilities, such as support for object-oriented data types and behaviors, which data servers can offer more effectively than relational databases.
Does the Microsoft Access use a relational or flat-file model?
Access can use a relational model of a database design.
Why would you use wizard in access?
A wizard in Access helps users automate tasks by guiding them through a series of steps to create a specific object, such as a form, report, or query. Wizards can simplify complex processes and help users with little technical expertise create objects efficiently.
Explain what is meant by repetition of information and inability to represent information Explain why each of these properties may indicate a bad relational database design?
Repetition of Information is a condition in a relational database where the values of one attribute are determined by the values of another attribute in the same relation, and both values are repeated throughout the relation. This is a bad relational database design because it increases the storage required for the relation and it makes updating the relation more difficult. - Inability to represent information is a condition where a relationship exists among only a proper subset of the attributes in a relation. This is bad relational database design because all the unrelated attributes must be filled with null values otherwise a tuple without the unrelated information cannot be inserted into the relation. Regards, Jose Deleep. S
Which normal form is considered adequate for normal relational database design?
1 NF
What are disadvantages of database approach?
The advantages of a relational database are that they contribute to sound logical design, are easy to understand and program, and should be amenable to change as business requirements change. The main earlier systems include file-based systems and Codasyl databases. File-based systems were complex and tended to be inherently restrictive and quickly reached the point where a complete rewrite became necessary if business requirements changed. Codasyl databases were a vast improvement on the old file-based systems, but required a high level of expertise to design properly and, once again, tended to be unable to support changes to business requirements. Because a properly designed relational database reflects business entities and the relationships among those entities, they should be more logical and easier to understand. If the business structure or requirements change in any logical way, the database can be changed in a parallel way, to support those requirements. Relational databases are designed at two levels. First, there is a logical design, normalised at third normal form - where there should not be duplicate data values. Then, there is a physical design, where any necessary denormalisation is carried out.
Which coupling is desirable trait for good system design?
Low coupling
