Data Warehouse Design: Dimensional Modeling II Data Technology Chularat Tanprasert, Ph.D. Recap Dimensional modeling Popular, useful, and pragmatic approach Based on Kimball Fact table Dimension tables Design process in steps Database Schema Design Star Schema (With Attributes) Example Designs A useful way to learn about data warehouse design principles is by using examples – reuse. Kimball – Data warehouse lifecycle toolkit
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IMPORTANT TIMES CLASS TIMES M, W, F Period 1: Period 2: Period 3: Period 4: Period 5: Period 11: 8:00 - 8:55 a.m. 9:10 - 10:05 a.m. 10:20 - 11:15 a.m. 11:30 - 12:25 p.m. 12:40 - 1:35 p.m. 6:50 - 7:45 a.m. FINAL EXAM SCHEDULE EXAM DATE CLASS PERIOD TIME OF EXAM Wednesday, December 3, 2014 Final Exam Prep Day (no finals before 5 pm) W only MW W only 5:30 p.m. 5:30 p.m. 7:00 p.m. 8:40 p.m. 9:00 a.m. 8:00 a.m. 11:10 a.m. 3:50 p.m. 5:30 p.m. 5:30 p.m. 7:00 p.m. 8:40 p.m. 9:10 a.m. 12:40 p
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Elements | Properties | lithium | Lithium is the first of the alkalis in the periodic table. In nature it’s found like a mixture of the isotopes Li6 and Li7. It’s the lightest solid metal; it’s soft, silvery-white, with a low melting point and reactive. Many of its physical and chemical properties are more similar to those of the alkaline earth metals than to those of its own group. | Sodium | Chemical element, symbol: Na, atomic number: 11 and atomic weight 22, 9898. It’s a soft metal, reactive
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CS 143 Final Exam Notes Disks A typical disk ▪ Platter diameter: 1-5 in ▪ Cylinders: 100 – 2000 ▪ Platters: 1 – 20 ▪ Sectors per track: 200 – 500 ▪ Sector size: 512 – 50K ▪ Overall capacity: 1G – 200GB ❖ ( sectors / track ) ( ( sector size ) ( ( cylinders ) ( ( 2 ( number of platters ) Disk access time ▪ Access time = (seek time) + (rotational delay) + (transfer time) ❖ Seek time – moving the head to the right track ❖ Rotational delay – wait until the
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A star schema consists of fact tables and dimension tables. Fact tables contain the quantitative or factual data about a business--the information being queried. This information is often numerical, additive measurements and can consist of many columns and millions or billions of rows. Dimension tables are usually smaller and hold descriptive data that reflects the dimensions, or attributes, of a business. SQL queries then use joins between fact and dimension tables and constraints on the data to
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mixture 7. Which of the following substances has a giant ionic structure? A. Iodine B. Diamond C. Sodium chloride D. Graphite 8. Which of the following INCREASES from left to right in period 3 of the periodic table? A. The number of shells in the atom of the elements B. The electrical conductivity of the elements C. The metallic character of the elements
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6-1 The famous Y. S. Chang Restaurant is open 24 hours a day. Waiters and busboys report for duty at 3am, 7am, 11am, 3pm, 7pm, or 11pm, and each works an 8-hour shift. The following table shows the minimum number of workers needed during the six periods into which the day is divided. Chang’s scheduling problem is to determine how many waiters and busboys should report for work at the start of each time period to minimize the total staff required for one day’s operation. (Hint: Let Xi equal the
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CCS20503/DCS20303/TCS20404 Data Structure and Algorithm Lab Practical 3 ------------------------------------------------- 4 April 2016 ------------------------------------------------- Instructions: 1. Complete ALL the question in this Lab Practical. 2. Complete and hand in all the materials below: a. Printed source code of your programs. b. Print screen sample output of your programs. 3. Submit your work directly to the instructor with the cover printed on RED colour paper.
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formed. The periodic table was created by a Russian chemist by the name of Dimitri Mendeleev. He created this table so that everyone would be able to see all of the things that he is able to see. This table is used all through the school system helping people all over the world understand chemistry and making it a lot easier. He wanted it to be organized in a way so that it will be in a group separating certain characteristics. The main purpose of the periodic table was to show the chemical properties
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different sheet. This group project can have Maximum 3 students. Exercise1 In this exercise, practice Conditional Formatting 1- Open a new sheet and Rename the sheet as “Exercise 1” 2- Type the next data and format the data as a Table. 3- Set up the rule that Excel formats any cell within a range with yellow fill color and dark yellow font color whenever it contains the word “Dairy”. 4- Set up the rule that excel formats any cell within a range with light red
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