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Which two statements are true about the advantages of using a data warehouse?
A data warehouse uses fewer database structures, so access to answers is faster and easier
A data warehouse is typically implemented with a different design, making access faster.
A data warehouse is optimized for ongoing write activity, making response faster.
A data warehouse uses specialized features of the Oracle database, like materialized views and star transformations, making response faster.
Answer: A, D
What are two ways in which query performance can be improved with partitioning?
Answer: A, D
Your customer is looking to implement ad-hoc analysis in a data warehouse. Which approach is least likely to be used assuming that the customer does not want the expense of managing view?
Third normal form schema
You have analyzed your client's workload and the Materialized Views Advisor in Enterprise Manager recommends that you create some materialized views to improve performance. What should you do in order to most simply implement this change?
Rewrite all the queries in the application to identify materialized view
Rewrite existing queries. New queries will automatically use the views.
Respond positively to the Advisor to create the materialized views.
Build virtual views on a third normal form schema.
A Full Rack Oracle Exadata Database Machine can contain 100 TB of disk space with high performance. How much user data should you conservatively estimate this configuration can hold?
What would you do to compress data in partitions that are frequently updated in Oracle Database11g?
Which feature of Oracle Warehouse Builder can be used to help ensure data quality?
Flash in the Oracle Exadata Database Machine is of lower latency (and enables faster access to data) than:
Memory and locally attached disk
Memory and network-attached disk
Locally attached and network-attached disk
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Data Warehousing 11g Essentials book
Let’s face it, the cyber web is a utility and so are the organisations who manage it | 1Z0-515 Real Questions and VCE Practice Test
in accordance with my lengthy background within the challenge capital business, it's increasingly apparent to me that many startups are failing or changing their company fashions because of dependence on the structures of Amazon, fb, and Google. The condition has stepped forward to the point that well-nigh every startup company requires as a minimum one of those digital platforms to attain its market, advertise its product, or run its carrier (Apple’s app shop may well be outlined right here for its tollbooth qualities, but I have chosen to exclude it since it isn't advertiser-pushed like the above groups).
It’s no secret these businesses rule their overlapping corners of the digital panorama and control the statistics that flows through them: Amazon captured practically 50 % of e-commerce transactions in 2018 and more of cloud computing. fb rules social media with more than half of the U.S. market (together with WhatsApp and Instagram) and possesses personal facts on over a billion clients and their friends. Alphabet, via Google, owns ninety % of on-line search.
Advertisers observe the traffic, giving these platforms a combined sixty five percent of on-line ad income. huge volumes of money plus consumer data are like the stone partitions and moat of a medieval fortress—the one unbreachable, the different unsurpassable. These corporations can afford to invest in much more technology than their competition to investigate consumer facts and build algorithms, to drive ad placement, new product design, and behavioral nudges in an limitless cycle of increasing market vigor.
These considerations look perfectly illustrated in Amazon’s plans to open a sequence of brick-and-mortar grocery shops cut loose total foods, as a case in aspect. although Amazon hasn’t introduced the locations for its new grocery stores, studies suggest it is asking at existing shopping facilities in addition to ex-city leading Streets, ostensibly filling the holes left by failing chains and mother-and-pop shops. It reads like a brand new video game from the identical playbook Amazon used to advance the bargain on-line bookselling mannequin that helped shutter hundreds of impartial bookstores, after which it has launched a sequence of brick-and-mortar Amazon Books outlets—the height of chutzpah. With grocery, the enterprise is neatly-located to investigate customer data from its site (as well as from Alexa and Ring domestic safety instruments) and installation the infrastructure to serve anticipated demand smartly ahead of the competitors.
perhaps even more concerning is that Amazon is now establishing its personal deepest label products in housewares, clothing, and most currently cosmetics and other consumables, and may direct clients to them. The business analyzes customer information from its network of structures, which includes Amazon shopping, Alexa Ring home protection gadgets, Amazon leading videos, and Amazon music. It uses this facts to now not only predict demand but also to nudge buyers to select Amazon products over the competitors. adding actual retailers to its on-line supplies makes US small agencies appear to be the dancing cherries in a online game of Pac-Man, except now the jaws are coming from all sides. it's a vicious circle as adversarial to a virtuous circle.
any person who thinks Amazon is uniquely located to undermine opponents should consider Google’s anti-aggressive practices: the european Union has levied greater than $10 billion in total fines towards Google after distinct investigations found the search significant had blocked ads from rivals and favored its own looking services in search outcomes (in full disclosure, this decision is being contested by way of Google).
Of path, some would argue that these corporations make notable systems for small businesses to reach their markets: App designers sell during the Google Play shop; small manufacturers promote in the course of the Amazon marketplace and advantage from the organization’s affordable warehousing and delivery; know-how birth-americahost their application-as-a-service (SaaS) on AWS or Google Cloud carrier; marketers buy programmatic options from Google and fb; and so forth.
Yet these brief-term merits come with lengthy-term prices. Small alterations to the algorithms underlying facebook’s feed or Google’s search can shrink site visitors extent to a company overnight. The identical can occur when Amazon adjusts its product search algorithm, or what’s included on best—which 50 % of US households use. Even Pinterest, with 260 million clients, skilled a meaningful reduction in traffic as a result of a transformation to Google’s algorithm, based on its regulatory submitting (and whereas i used to be an early investor in Apple in 1979 and have a distinct emotional attachment to the company, let’s now not ignore the proven fact that Apple is at the moment fighting a Supreme court docket case that claims its App keep is a monopoly).
i am not inherently towards Amazon, facebook, Google, or, for that depend, Apple, nor do I object prima facie to their measurement—our agencies have benefited when a large participant purchased a smaller rival. My issue is with the influence they've over our business and societal panorama. There are not any elementary solutions, however one factor is inarguable: the U.S. has lengthy covered the rights of retailers to reach their markets. legal guidelines in place for that intention encompass the Sherman Act of 1890 and the Clayton Act in 1914. both have been written for an industrial period when have an effect on turned into measured in miles of railroad track and barrels of oil, and monopolistic practices wrought seen penalties within the form of greater expenditures. these days’s equivalent is terra-bytes of statistics, and the brief-time period penalties are less obtrusive because statistics and the way it is used is invisible. We don't have any concept of the latitude of information the
structures have, no visibility into how they use it, and no perception into what their have an impact on might appear to be in ten years. besides the fact that children, it's secure to count on at this factor that they recognize every little thing about you.
One choice is to admire these firms are “simple networks” simply as railroads, telecommunications conglomerates, and utility businesses are, and impose the general carriage rules utilized to each fundamental network in our nation’s background. these suggestions require networks to raise each person's goods and tips on a first-come, first served foundation, and to cost all and sundry the equal fee for a similar service. They additionally prohibit networks from competing with groups that depend on them to get to market. These rules were used twice in fresh historical past to check excessive market power: first in opposition t Microsoft in the late Nineteen Nineties to block vertical integration of the browser into windows and 2nd throughout the debate leading to the web Neutrality determination in 2015.
A 2d and extra draconian step is to trust breaking them up in some manner. up to date antitrust laws could regulate access to 3rd-celebration information and limit these agencies’ skill to market additional products and functions.
possibly alternate may also start from internal the behemoths themselves. I heard Tim cook dinner speak on the Time one hundred Summit in long island closing week, and he become adamant that “We need to admit that what we’re doing isn’t working. know-how must be regulated. There are actually too many examples the place the no rails have resulted in a pretty good harm to society.” It’s totally viable that corporate leaders will become advocates for developing greater aggressive markets.
No matter what comes next, the genie is out of the bottle. companies like Amazon, fb and Google are utilities. It’s time to take steps to make certain that their magic serves the general public’s pastime in preference to making the public serve theirs.
An abridged edition of this piece was initially posted in monetary times.
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