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Concepts of Database Management
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Design Methodologies Fundamentals of Database Often as a company grows there may be a demand , because their data volumes increases and it is difficult to store their data physically in papers .They needed effective secure, and easy ways to do this. To counteract this companies came up with file systems which had their own constraints .So they went for the latest used solution now available the database. Temenos a technology manager cited about a relational database oracle as below "Oracle Database Appliance as an ideal 'Bank-in-a-Box' solution for T24 customers who are looking for reduced deployment costs and low maintenance with high performance. We are excited with the Oracle Database Appliance's new virtualized platform that will provide workload isolation between the database and application." (Temenos,n.d) Fundamentals of a database are people, hardware, software, DBMS People: For a growing company databases have to be created, maintained and supported. To achieve this skilled people on database side are needed. Also there are other day to day tasks in administration for Database people. Hardware: Essential Hardware components are needed for the installation of the database software. It might be on a Mainframe system with specific Ram , Speed or Disc space. These hardware requirements are provided on the installation manual that comes with the software or in a document. Software: software is needed to install the database in a computer. They can either be installed from a compact disc, network or downloaded .For example the Db2 software is mostly installed and used in a Mainframe environment. There are installation engineers or system programmers who configure the software and make the environment available and r... ... middle of paper ... ...accommodate further processing requirements. Also reduces the number of data dependencies that should be analyzed, using the extended ER model conceptualization, and maintains data integrity through normalization. This approach can be implemented manually or in a simple software package as long as a "good" solution is acceptable and absolute optimality is not required. Normalisation reduces data redundancy and integrity. It can be a good technique to better organisation of data. But it has pros and cons on the other hand. Usually companies don’t go beyond the third normal form as it increases the complexity more. Also it reduces the speed as more joins have to be made to join all the split tables due to normalisation technique. It all mostly depends on the volume of data, complexity of business processes and rules to determine the normalisation level a company needs
In 1977, Larry Ellison, Bob Miner, and Ed Oates founded System Development Laboratories. After being inspired by a research paper written in 1970 by an IBM researcher titled “A Relational Model of Data for Large Shared Data Banks” they decided to build a new type of database called a relational database system. The original project on the relational database system was for the government (Central Intelligence Agency) and was dubbed ‘Oracle.’ They thought this would be appropriate because the meaning of Oracle is source of wisdom.
Database optimization is something, that while may go unnoticed, is very important a very important for saving time and CPU usage. In attempting queries on the math database downloaded form stackexchange. A query is an expression written in a programming language, in this case SQL, that is used for data look up in a database. Stackexchange is a large compressed file that contains a record of all the forums from the website stackoverflow.com. I specifically used the math files since they are one of the largest files in size and serve as a perfect example for why database optimization, and finding efficient SQL queries is important. I have noticed that complicated queries can be optimized to make for faster, more complete results. With the size of the files that I was using to create my database each being any where from 30 megabytes to 600 megabytes, which inserted a few hundred thousand lines of data into my tables, even simple queries, such as “SELECT * FROM posts”, that normally take less than a second to run were taking as long as 10 or 15 seconds. From experimentation and research, the best way speed up queries are, knowing you database, being specific, and using techniques, such as indexes.
The sole purpose of existence of such databases is approach to simplicity in design, better horizontal scaling and greater control over the availability of data. See Figure 3 for scaling. The use of other means of storing data and different access mechanism, provide faster access to data based on the problem which the organization aims and this is also the reason NoSQL databases is famous for use in big-data and real-time web applications.
DBA deals with all of this by finding user needs, set the database, and test the system. DBA should enable editing any system he or she created. At the same time DBA should ensure the security of the data and guarantee data integrity and backup. Moreover, DBAs should know the database management systems (DBMS) that include the knowledge of Oracle, IBM DB2, and Microsoft SQL server (“Database Administrator,” 2010). Oracle is one of the most important platforms that DBA must know and have experience with. According to Kanaracus “The database experience we look for most of the time is Oracle”, says Tom Hart, executive vice president of the operations and technology group at Veritude. “SQL Server is more of a nice-to-have"
Staff training in GIS technology, database operation and maintenance and good data documentation practises is essential.
may have had a form that is made up of lots of little boxes that you
Normalization, Integrity and Security are the important role for a DBA, Normalization helps to avoid data redundancy by reviewing data base structure at certain level. It helps to build an effective data model. Data Integrity provide some level of assurance over the information getting store and retrieved from database, DBA has to understand all DBMS features use them correctly for Data Integrity. Data Security is toughest part for DBA, auditing and multiple level security can protect data but none of them provide complete security, security can also be managed by encrypting and masking the organization data.
A database is a structured collection of data. Data refers to the characteristics of people, things, and events. Oracle stores each data item in its own field. For example, a person's first name, date of birth, and their postal code are each stored in separate fields. The name of a field usually reflects...
Database systems play an important role in our daily lives, and the need to be used in various fields of life in the present day are
It is a collection of programs that enables user to create and maintain a Database.
First, database management systems can be very complex and difficult to understand. The designers and the end users must have the necessary skills in order for them to use it properly. The database designers need to have the SQL coding knowledge to properly write the database software. Not only do they have to know SQL coding, they will have to learn the altered version of SQL the database management software might use. The end user will need the understanding of how to run queries, generate reports, and update the database if their security level allows.
When a DBMS is used, information systems can be changed much more easily as the organization's information requirements change. New categories of data can be added to the database without disruption to the existing system. Organizations may use one kind of DBMS for daily transaction processing then move the detail onto another computer that uses another DBMS better suited for random inquiries and analysis. Overall systems design decisions are performed by data administrators and systems analysts. Detailed database design is performed by database administrators.
of multiple types of end users. The data is stored in one location so that they
Databases have been in use since the earliest days of electronic computing, but the vast majority of these were custom programs written to access custom databases. Unlike modern systems which can be applied to widely different databases and needs, these systems were tightly linked to the database in order to gain speed at the price of flexibility.
In our world, people rely heavily on the power of technology every day. Kids are learning how to operate an iPad before they can even say their first word. School assignments have become virtual, making it possible to do anywhere in the world. We can receive information from across the world in less than a second with the touch of a button. Technology is a big part of our lives, and without it life just becomes a lot harder. Just like our phones have such an importance to us in our daily lives, database management systems are the same for businesses. Without this important software, it would be almost impossible for companies to complete simple daily tasks with such ease.