Star Schema and Snow Flake Schema

61
20256
star schema
star schema

Friends,

I have never taken and also given an interview on SSAS(even on MSBI) with out the question “What is the difference between STAR and SNOWFLAKE Schema”.  Before going to the differences lets have a look at what a schema is and the types.

Schema in relational database defines the tables, columns in each table, and the relationships between tables. It gives a clear picture about the tables present in the database how the tables are related to each other. There are mainly two types of schema(and ppl are adding one per day like STARFLAKE,GALAXY and so on .. but not to worry much about those) which are listed below.

1) Star

2) SnowFlake.

Lets discuss about each type in detail here.

Star – 

This is the simplest Schema design available and in the star schema design, a single object (the fact table) sits in the middle and is radially connected to other surrounding objects (dimension lookup tables) like a star. Each dimension is represented as a single table. The primary key in each dimension table is related to a foreign key in the fact table. In simple when ALL the DIMENSION TABLES are DIRECTLY related to FACT TABLE then that Schema is called as Star Schema. PFB the Screenshot showing STAR Schema.

 

star schema
star schema

Snow Flake

The snowflake schema is an extension of the star schema, where each point of the star explodes into more points. In a star schema, each dimension is represented by a single dimensional table, whereas in a snowflake schema, that dimensional table is normalized into multiple lookup tables, each representing a level in the dimensional hierarchy. When ALL the dimension tables are NOT directly related to FACT table then that type of schema is called as Snow Flake Schema. PFB Screenshot of Snow Flake Schema.

Snow Flake Schema
Snow Flake Schema

In snow flake schema fact table will be linked directly as well as there will be some intermediate dimension tables or Fact less Fact tables between fact and dimension tables.

That’s it .. Happy Coding !!

Regards,

Roopesh Babu V

61 COMMENTS

  1. Atherosclerosis may reduce NO levels and Rho-kinase activation and may result in loss of smooth muscle from the bladder detrusor and prostate fibrosis associated with loss of bladder compliance and increased urethral resistance, respectively priligy dapoxetine review At some point, you must agree to try cialis in a group setting with someone who is healthy enough to be giving the drug, since you will need to decide what you truly feel about the drug

  2. Also, they d have to arrest the governments of the states of Wisconsin, Minnesota, Illinois, Vermont, as well as many city governments and private employers who have turned north for lower-cost prescription drugs emla cream and priligy tablets Because of this, it s best to use Stendra as close to the time you plan to have sex as possible

  3. Heinrich had an older brother, Gebhard Ludwig Himmler, and a younger brother, Ernst Hermann Himmler safe cialis online Brand Tadarise Composition Tadalafil 20mg Form Tablet Pack Size 10 tablets in strip Packaging Type Box Country of Origin Made in India Tadalafil PDE-5 inhibitor is an active salt in Tadarise 40 Mg tablet which is increases the blood flow to the penis by relaxing the muscles in penile blood vessels hence, treating Erectile Dysfunctioning

  4. Для точной диагностики обращайтесь к специалисту. Капли от глаукомы для роста ресниц нельзя использовать без строгих показаний и консультации с лечащим врачом. 1. Сыворотка для ресниц M.A.C,2. Сыворотка для ресниц Faberlic,3. Восстанавливающая сыворотка для ресниц и бровей Mary Kay. 1 елемент Латисс – раствор, изготовляемый на основе жирной кислоты (биматопроста). Препарат обеспечивает обновление ресничек. Активные вещества проникают в луковицы, тем самым, они стимулируют рост волосков. Средство выпускается в форме флакончика на 5 мл. Его нужно аккуратно распределять по линии роста ресничек, избегая попадания в глаза. Чтобы ресницы были длинными, выглядели красивыми и ухоженными, не обязательно тратить много денег. Для достижения эффектного результата можно использовать недорогие средства для роста ресниц, купленные в аптеке. Головные боли, головокружения, сильная утомляемость, искажение и затуманивание изображения, сложности с восприятием пространства. https://shanerhaq643198.shoutmyblog.com/14276245/mizuho-массажер-против-морщин Nature`s Bounty – Пищевые добавки для поддержания вашего здоровья и красоты Зарегистрированные покупатели получат Карту постоянного клиента Деошоп.ру. Революционная формула усилителя ресниц Revitalash гарантированно борется с проявлениями сухости, ломкости и выпадением ресниц. Увлажняет, смягчает, питает, восстанавливает, укрепляет. Максимально улучшает внешний вид ресниц, делает их густыми и красивыми. Первые результаты видны уже через 2-4 недели ежедневного применения! Благодаря составу, содержащему пептиды и минералы, средство способно разбудить даже спящие луковицы ваших ресниц. Розовый жемчуг и коралл восстанавливают поврежденные ресницы, кардамон усиливает кровообращение и ускоряет рост, а экстракт листьев алоэ защищает от вредного влияния окружающей среды. Революционная формула усилителя ресниц Revitalash гарантированно борется с проявлениями сухости, ломкости и выпадением ресниц. Увлажняет, смягчает, питает, восстанавливает, укрепляет. Максимально улучшает внешний вид ресниц, делает их густыми и красивыми. Первые результаты видны уже через 2-4 недели ежедневного применения!

  5. Try and win big in SCR888 Casino on our superb video poker games. There are a few tricks that could increase the odds of winning games in SCR888 Casino. SCR888 is undeniably the most successful mobile slot games in the recent years. Indulge yourself in SCR888 Casino and gain access to the very best online casino games available straight away to win big! With the SCR888 online and mobile gambling platform, you get the newest and best gaming experience available anywhere. We are an online casino provider in Malaysia that specializes in providing the best online casino applications for users to play and gamble at on the go. Fill in your details below or click an icon to log in: kiosk2.scr888.com                             tm.scr888.com                                              wechat: cs-club88     whatsapp: 0108683043 http://guineapig.org.uk/community/profile/domingawilks027/ Now that you know this, do not get discouraged from using no deposit bonuses! The odds of winning money with a no deposit bonus are lower compared to other bonuses – but you risk less because you can always decide to not deposit anything and to not withdraw the free spins winnings! Please enable Cookies and reload the page. Specializing in Organic Haircare, Non-Toxic Hair Color, Hand Painted Balayage, Blonding, Curly Cuts, Curl Maintenance, and Personalized Treatments. No deposit bonuses are just the beginning of a new player’s Bitcoin casino journey. It is highly likely that the casino offering the NDB will follow up with additional bonuses and promotions including deposit bonuses, VIP rewards, Loyalty bonuses, daily promotions, free spins and so much more. Be sure to keep an eye on your email inbox and mobile notifications to catch new and exciting bonuses that may come your way!

  6. In conjunction with the regulations set out in the act, York Regional Police, working alongside our municipal, regional, provincial and federal partners, will be enforcing violations of the federal act and the provincial regulations, concentrating on the following enforcement responsibilities . The penalties for the two hybrid offences are the same as for alcohol-impaired driving. These include mandatory minimum penalties of a $1,000 fine for a first offence, 30 days imprisonment for a second offence and 120 days imprisonment for a third offence. Canadian Pesticide Mix 3, 100 µg mL in LC MS Acetonitrile If a person ceases to hold a licence, they must, in respect of any document or information that they were required to retain under the Cannabis Regulations and for which the retention period has not yet ended, ensure that the document or information continues to be retained until the end of the retention period and provide the Minister with notice in writing of the address of the location at which the documents or information is retained and of any subsequent change to the address. https://plataformamusic.com/community/profile/valenciaclem486 Cannabis has taken Canada by storm ever since legalization. This is in large part due to the many health benefits and therapeutic effects that come with taking marijuana. Many cannabis users take marijuana products to help treat various medical conditions like stress, anxiety, pain, inflammation, and more. The last time… The largest difference is simply the reason for using cannabis. If you’re using it as medicine, it’s medical marijuana. LowPriceBud is the only top online dispensary in Canada that provides high-quality cheap buds in Canada with fast shipping. You don’t have to compromise on quality to get affordable marijuana. When you buy weed online from LowPriceBud today you get premium cannabis strains for the lowest prices. With our in-house healthcare app developers, app designers, business experts and even compliance consultants, we help you start the online marijuana dispensary from scratch. 

  7. Da ihr im Internet leider sehr oft falsche Berichte zu möglichen Freispielen für Jackpot-Slots erhaltet, möchten wir euch hierüber kurz aufklären. Es sollte keinen von euch überraschen, dass alle Free Spins, die ihr als Neukunden von eurem Online-Casino angeboten bekommt, ausschließlich für reguläre Slots gedacht sind und demnach auch nicht zu den deutlich lukrativeren Jackpot-Slots transferiert werden können. Der Grund hierfür liegt auf der Hand: Es geht um die Einschränkung eurer Gewinnmöglichkeiten – bei Freispielen ohne Einzahlung eine gängige Praxis. Mehr dazu im folgenden Abschnitt. Freispiele mit Einzahlung können sowohl Neukunden als auch reguläre Casino-Spieler erhalten und mit den vorgenannten Möglichkeiten aktivieren, abhängig davon, auf welche Art der Online-Glücksspielanbieter diesen Freispiel-Bonus vergibt. Egal ob automatisch, mit einem Bonus Code oder den Kundendienst – für Freispiele mit Einzahlung kommt noch ein Schritt dazu. Laden Sie Ihr Spieler-Konto mit der erforderlichen Summe auf, oft reicht schon der Mindestbetrag. Dann öffnen Sie das Slot-Spiel und genießen Ihre Freispiele wie gewohnt. https://odolbodol.shop/index.php?page=user&action=pub_profile&id=2433266 Die Online Spielautomaten Casinos aus unserer Bestenliste bieten das beste Gesamtpaket an Spielauswahl, Gewinnchancen und Sicherheit. Dennoch gilt eines: Jedes Online Casino hat eigene Stärken und Schwächen. Ob bei den besten Online Slots oder den traditionellen Spielautomaten in Deutschland. Am Ende sollte der Spieler immer auf seine persönlichen Spielvorlieben achten. Alle diese Entwickler bieten hochqualitative und gewinnbringende Online Spielautomaten Echtgeld. Haben Sie Spielautomaten kostenlos Spielen ohne Anmeldung Book of Ra ausprobiert? Dann wissen Sie sicherlich, dass es eines der bekanntesten Spiele von Novomatic – einem berühmten österreichischen Hersteller ist. Der andere weltweit bekannte Entwickler ist NetEnt mit dem Hauptsitz in Schweden, der erstklassige kostenlos Automatenspiele mit Bonusrunden und Spezialfunktionen anbietet. Spiele von Merkur sind auch bei deutschen Casino-Besuchern sehr beliebt. Stellen Sie es selbst sicher und überzeugen Sie sich von der hohen Qualität dieser Spiele, während Sie Automatenspiele kostenlos ohne Anmeldung spielen!

  8. Converse com os traders de criptomoedas Os donos das bancas ganham uma pequena participação sobre as transações e têm liberdade para defini-la dentro de um limite máximo de 10% estabelecido pela Pundi X, que por sua vez fica com um spread de 1% sobre o valor transacionado. As altas taxas bancárias e das redes de adquirência no Brasil tornam a solução atraente para os pequenos comerciantes, além de representar uma nova fonte de receita para eles, argumenta Zac Cheah, CEO da Pundi X. Ele está em visita ao Brasil nesta semana e conversou por telefone com Mobile Time. Você sabe qual é a melhor exchange de criptomoedas do Brasil? Afinal, o mercado brasileiro tem ganhado players deste nicho com bons benefícios. Neste caso, é fundamental levar em conta o atendimento, liquidez, segurança, taxas, histórico, entre outros critérios relevantes. http://www.estraviz.es/community/profile/muhammad49r4895/ Quanto ao prazo de transações via TED, a Binance informa que essas são realizadas em horários de expediente bancário. Dessa forma, em algumas ocasiões é possível demorar até dois dias úteis para ser confirmado. Creio que a maioria das reclamações das pessoas no Reclame aqui é por falta de conhecimento do mercado de criptomoedas e por não saber operar direito na Plataforma da Binance. Tenho conta na Binance desde seu nascimento, em julho de 2017, e nunca tive problema algum, na exchange. O que significa colocar CRO em staking? Significa que você bloqueia por um período mínimo de 180 dias as suas criptomoedas CRO no exchange da Crypto.com. Ao final do período você pode sacar o valor total em CRO da plataforma ou mantê-lo em stake. Quais as vantagens? As vantagens são os descontos nas taxas de trading e eventuais rendimentos que você obtém em base da quantidade de CRO que coloca em staking. Quais os riscos? O risco é que daqui 180 dias a criptomoeda CRO se desvalorize e embora você tenha a mesma quantidade de CRO o valor equivalente em dólares, euros ou reais é menor do que no momento em que você depositou.

  9. Les machines à sous Megaways exploitent la fonctionnalité de combinaison gagnante en cascade. Cette fonction peut légèrement varier en fonction du thème de la machine. Elle est souvent nommée “réaction, avalanche, cascade etc…”. Lorsque cette fonction se déclenche, les symboles gagnants explosent pour être remplacés par les symboles suivants. L’enchaînement de symboles gagnants fait augmenter les gains du joueur. Les nombreux thèmes proposés sur les machine à sous entièrement gratuite en ligne permettent de combler les joueurs aux profils divers et variés. En effet, la multitude de thématiques existantes autour des slots vont transporter le joueur dans des univers totalement différents allant de la Grèce antique aux animaux en passant par les thèmes d’épouvante. https://ruskillfish.ru/forum/profile/anyaliston40609/ S’il vous plaît, expliquez: S’il vous plaît, expliquez: Pour profiter du gain offert dans Deuces and Joker Poker, le joueur doit avoir la combinaison de poker expliqué dans les règles du jeu. En général, ces derniers sont identiques aux termes et conditions de jeu imposés dans la majorité des types de vidéo poker. Il faut simplement avoir à l’esprit que le changement autorisé ici va jusqu’à 5 cartes une seule fois, en cas de nécessité. Rachel Rivera a noté un casino Quel est le problème? Le vidéo poker fait partie des jeux en ligne les plus intéressants, et plusieurs casinos français le proposent, aussi bien en version gratuite qu’en mode payant. Les démos présentent de nombreux avantages pour les joueurs, puisqu’elles leur donnent la possibilité d’apprendre les règles aisément. De plus, il existe tellement de variantes en ligne, les parieurs pourront à loisir profiter des démos pour tester toutes les différentes versions qui les intéressent. Ils ont ainsi la possibilité d’essayer de nouvelles stratégies de pari et de se préparer au mieux avant de jouer de l’argent réel.

  10. While Complainant acknowledged that she experienced health problems prior to the discrimination, she provided documentation indicating that her health worsened after the cancellation of her reassignment priligy dosage kroniskt obstruktiv lungsjukdom KOL, lungcancer och i hjärt kärlsystemet som arterioskleros, hjärtinfarkt, claudicatio intermittens

  11. You can deduct losses from crypto gambling—but only up to the amount of your crypto winnings and only if they exceed the standard deduction and any other allowable deductions. In other words, you can’t use gambling losses to offset earnings from investments or other income. The most popular bonus is the Welcome Bonus. Normally you will get it once you’ve registered at a casino and it’s a great way of getting to know both the casino and their games before going all-in with a deposit. BitStarz has one of the biggest welcome bonuses around, so make sure you check it out. Bitcoin Casino in India is a new concept but it is slowly picking up. Bitcoin is still an emerging market in India and the government has not yet provided any regulations regarding Bitcoin and gambling. However, this does not mean that Bitcoin gambling is illegal in India. There are no specific laws in India that prohibit or allow Bitcoin gambling. https://songwriterjunction.com/community/profile/chet0456872419/ The number of games on Bitcasino is limited compared to some of the other casinos we’ve reviewed here, but it makes up for that with niche lottery and bingo games. Bitcasino’s live poker matches, which function just like a real table game of poker, are a great way for classic casino lovers to buy-in with Bitcoin. With Bitcoin adoption at an all-time high, more and more online casinos are now accepting this cryptocurrency. While this increased selection is great, it leaves one major question – how do you know where to find the best Bitcoin casinos? Wild Casino is our top pick overall and our recommendation for high rollers. Wild Casino supports Bitcoin deposits up to $500,000. When it’s time to make a withdrawal, Wild Casino sends Bitcoin payouts up to $100,000. In an industry which often throttles payments, Wild Casino stands out as the best for Bitcoin high rollers. Payments arrive to your wallet within 48 hours.

  12. In ITP, an autoimmune disease, the host makes autoantibodies from plasma cells in the spleen that target platelet glycoprotein Gp2b3a which are then sequestered by splenic macrophages nolvadex half life It is important to note that YK- 11 can cause several adverse effects, so it is best to research these before starting a cycle

LEAVE A REPLY

Please enter your comment!
Please enter your name here

23 − 22 =