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.
Matthias Jarke and Jurgen Koch's paper Query Optimization in Database Systems also displayes the continued importance of finding way to make efficient queries when using a database system. “Efficient methods of processinf unanticipated queries are a crucial prerequisite for the success of generalized database management systems.”( Query Optimization in Database Systems) The paper also explains the importance of knowing the database and what you are searching for. Also explained is the importance of finding alternate ways to make a quer...
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... to shorten the amount of time I spent waiting for a query to finish. The biggest improvements came form using indexes and joins. Using an index made it so the queries had a sort of reference when searching and performing operations on specific columns. Joins decreased the amount of operations the system had to process and made the biggest difference in run time. As databases grow it is important to try and reduce the over all cost by optimizing queries.
Works Cited
"2012-02-15Slow Indexes, Part II." Slow SQL Indexes. N.p., n.d. Web. 10 Apr. 2014.
"2.6. Joins Between Tables." PostgreSQL: Documentation: 8.3: Joins Between Tables. N.p., n.d. Web. 10 Apr. 2014.
"CREATE INDEX." PostgreSQL: Documentation: 9.1: CREATE INDEX. N.p., n.d. Web. 10 Apr. 2014.
"Query Optimization in Database Systems." Query Optimization in Database Systems. N.p., n.d. Web. 10 Apr. 2014.
Oracle ThinkQuest. Oracle Education Foundation, 04 Jun 2010. Web.
A database management system, or DBMS, gives the user access to their data and helps them transform the data into information. Such database management systems include dBase, Paradox, IMS, and Oracle. These systems allow users to create, update, and extract information from their databases. Compared to a manual filing system, the biggest advantages to a computerized database system are speed, accuracy, and accessibility.
Time use is such an important aspect of any business. The main goal for many companies is thinking how can we be the most beneficial with our
But, the drawback here is that the result size for each query is inconvenient to control and also, difficult to manage the volume of the search result and with that also to avoid excluding the relevant documents required for the search.
[7] Elmasri & Navathe. Fundamentals of database systems, 4th edition. Addison-Wesley, Redwood City, CA. 2004.
Currently, businesses want to use the information effectively for competitive advantage to make better decisions that improve and optimize business processes, predict the market dynamics accurately, optimize forecasts to adequately maintain resources to name a few reasons.
This helps a lot because it get you used to running through all of the site and when you get into real time pace you are a lot quicker than you even need to me. Another time management technique that is quite effective is by setting yourself small goals for each task that you are doing. E.g. if I had to fill out 10 pages of information and I knew that I had only 5 minutes to do it, I would break that up into smaller tasks by telling myself that I have 30 seconds to do each page and try to stick to that. I do this because it is easy to think that you are ahead or behind when you have a long term goal but if you have a short goal like 30 seconds then you can track your progress and know if you are ahead or behind a lot easier. One of the best ICT tools that we have at our disposal to manage our time is an application callled formfill, this application cuts our time to run through calls in half becuase instead of having to manually run through these sites we can use this application that insteantly gives us results. This is one of the best ways that we can manage our
Time Consuming: Managers spend a great deal of time preparing, researching and communicating the process, which may impede day-to-day operations and negatively impact the business. For example, managers may overlook daily issues needing resolution, and inadvertently cause a decrease in employee productivity and short-term sales.
Almost all commercial database systems available today are designed to provide a high level of performance to its users. Nonetheless, Database Performance Tuning for large volumes of data is an arduous task. Even minor changes can bring about a substantial impact (positive or negative) on the performance of the system (KOCH, 2014).
Reduces Stress: Many are stressed as a result of too much to do in very little time and become so overwhelmed mentally to the point of even becoming physically ill but with good time management skill, you know what to do and how long to do it for. Optional tasks not completed same day can be moved next day task list.
It simplifies the storage and processing of large amounts of data, eases the deployment and operation of large-scale global products and services, and automates much of the administration of large-scale clusters of computers.
Information system can replace the previous manual handling operations to save a lot of time and labor costs.
The Database Management System (DBMS) is software that enables the users to define, create, maintain and control the access to the database. It is a software that interact with the user’s applications programs and it database. Meanwhile, information retrieval system is a system that involved the activity that the systems obtain the information. The obtaining information action need the information from it resources.
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.
1. You are working as a database architect for your organization. An application programmer that uses your database has a performance problem. The application she is writing has a looping structure that fires off a SQL statement for each looping iteration. In each SQL statement, only the WHERE statement is altered. What would be your recommendation to her?