a developers guide to data modeling for sql server covering sql server 2005 and 2008 pdf
A Developer''''s Guide to Data Modeling for SQL Server doc
... hierarchicalidentities, and spatial data types. There is also a new file storage data typethat we’ll talk about shortly. Sql_ variant A column defined as sql_ variant can store most any data that ... calculating exact times, aswell as durations. Let’s look at each in turn.Datetime and SmalldatetimeThe datetime and smalldatetime data types can store date and time data in a variety of formats; ... change and new data becomesavailable. A sound data model will provide for scaling. This means thatcustomers can continue to add records to the database, and the model willnot run into problems....
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A Managers Guide to Data warehousing docx
... ProgramsTransformationToolInformatica Informatica SAS Programs Data Movement Informatica Informatica SAS Data Cleansing NA NA NADBMS Oracle Oracle EssbaseDatabase Load Oracle Informatica EssbaseEnd User Data AccessBusiness ... MARKETINGTECHNICAL SALES DATA REPORTING CAMPAIGN>COMPONENT MART SYSTEM MANAGEMENT Data Modeling ToolER-Win None None Data ExtractToolInformatica Informatica SAS ProgramsTransformationToolInformatica ... 231What Is Information Management? 232Information Management Example—Customer Data 235IM Beyond the Data Warehouse 239Master Data Management 240Master Data Feeds the Data Warehouse 242Finding...
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a developers guide to amazon simpledb
... is a master-slave database replication scheme, wherethe master database accepts client updates and a second database acts as a slave and pulls all theupdates from the master.This eliminates ... }}The call to the client method domainMetadata() returns a map of metadata entrynames to numeric values.Amazon serves the DomainMetadata operation values from a cache and not necessarily from a fresh ... Amazon Web Services, Sim-pleDB can be a strong candidate for queryable data storage across a wide range ofapplications. Of course, running a relational database on an EC2 instance is also a...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 1 potx
... County–Marietta Water Authority for providing application data, and Bill Sandidge of Instrumentation and Design, Inc., for assistance in clarifying some of the issues with software and SCADA integration. ... Counting 63 a. Sample Handling 63b. Grab Sampling Presents a Partial Picture 64c. Data Handling 643. Benefits of Grab Samplers 644. Alternatives to Grab Sampling 65C. Grab-Sampler Sample Handling ... 1671. Data Presentation 1672. Trend Display 168 a. Scaling and Configuration 168b. Time Period 1723. Tabular Data Display 1764. Status Display and Alarms 1775. Event Log 1836. Reporting 183 a. ...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 2 potx
... Packaged Treatment PlantsPackaged treatment plants, as touched on above, are prefabricated plants, whichare more cost-effective than ground-up plants for smaller applications. A packagedplant ... Cryptosporidium and Giardia are parasites that live in the intestinal tracts ofcattle and other mammals. They are spread into source waters by runoff from areaswhere these animals leave ... plant will produce spikes or other changes in the particle count data. The operator should be able to look at the particle count trend and trace thecause of any changes to various plant operations....
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 3 ppt
... maintenance schedule should account for seasonal changes, and be adjustedaccordingly. Permanganate is often added seasonally, and can cause coating prob-lems. Any change in the process that can affect ... to plant operation, and to hold them accountable for keeping it up. Mostproblems are flow and sample related, and are not complicated. Problems related to data collection and computer interfacing ... erroneous data, changes in flow that are notaccounted for will create errors due to counting particles over too large or too small a volume of sample.Fortunately, flow and flow control are areas with...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 4 pot
... system, and how to use the data as diagnostic tool and not just a checklist.We will attempt to provide a framework for developing a useful and practicalapproach to particle counting that can be tailored ... second alternative is the direct interface of the particle counters to SCADAusing serial data communications. All count data, as well as status and alarminformation, are transmitted in a specially ... periods, and can be processedstatistically. Chart recordings are frozen in form, and require manual manipulation for any type of comparison.3. Historical data can be retrieved and stored easily, backed...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 5 potx
... PRACTICAL GUIDE TO PARTICLE COUNTINGD. DATA HANDLING As touched on above, grab-sampler data handling is a cumbersome task. Anynumber of approaches are available for organizing grab-sample data, and ... its value. If these data are available in a usable file format that can be imported into a spreadsheet or database program, thetask is made easier. The more data that are available, the more complete ... to store and display the data. Paper tape printouts are a nuisance, and most units are designed to off-load data directly to a personal computer. A good spreadsheet program will be necessary.Once...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 6 doc
... the primary specifications employed for evaluating particlecounter performance are defined and discussed. Understanding of these few speci-fication parameters is essential to making informed decisions ... detected and measured if it produces a signal with a minimum 2 to 1 signal -to- noise ratio. B. SIGNAL -TO- NOISE RATIO All electronic instruments are subject to various forms of “noise,” or random,meaningless ... mentioned is Section A, the smallest particle that can be reliably measuredmust produce a signal amplitude at least twice that of the noise, or a 2 to 1 signal- to- noise ratio. C. RESOLUTION...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 7 potx
... 82 A PRACTICAL GUIDE TO PARTICLE COUNTING The cell window materials vary in optical quality. Small imperfections in thematerial diffuse the light and are a source of resolution and sizing ... and sizing error. Quartz mayhave fewer imperfections as far as optical quality is concerned. It is a softer materialthan sapphire, and thus can be bored and polished to create the single window ... reflected back intothe laser, it can disrupt this process, and cause variations in the beam intensity. Thisis another reason that aluminum flow cells are anodized a dark color, as the shinymetallic...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 8 ppt
... called a voltage comparatorinput stage. The more complex approach involves analog -to- digital (A/ D) conversion. 1. Voltage Comparator A comparator is simply a small circuit that “compares” an ... typicallycommunicated every minute.The comparator provides a simple way to convert the particle size informationfrom an analog pulse to a digital count value. It is a very basic form of analog -to- digital ... resistance, and a host of other factors limit its acceleration. Electronicsignals are analogous. While they are much, much faster than any car, they cannotchange voltage levels instantaneously. As...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 9 ppt
... voltage range of a chart recorder or SCADA analoginput is 1 to 5 V. A 250 Ω resistor is required to convert a 4 to 20 mA signal into a 1 to 5 V signal.Another benefit of the 4 to 20 mA current ... display of data and alarms. These areprimarily of use during installation and maintenance. The particle counters areusually mounted down in the filter gallery or in other out of the way places, ... some cases, flow alarms can be signaled by the particlecounter via the computer data collection system. A. DIAGNOSTIC SIGNALS, ALARMS, AND DISPLAYS The most common alarm found on particle...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 10 ppt
... industry standard signal formats (RS-485 and RS-232) and the non-standard protocols. To make an analogy, the signal format could be compared to “speaking out loud” and the protocol to the “language” ... Dynamic Data Exchange (DDE) Dynamic Data Exchange is what the name implies, a constant “exchange” of data between the particle counter software package and a SCADA software package.The particle ... in any type of format, referred to as a “protocol.”These protocols are not standardized, and a lot of effort can be expended in “trans-lating” the data into usable form. Many laypeople are...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 11 doc
... of value to retrace the data from several yearsback. As storage becomes less and less costly, there is less of a reason to discard data. If a year’s worth of particle counting data can be stored ... to a gigabyte or more. They are most useful for manual data backup and transport. Data can be accessed more quickly than from a tape backup, and these disks can be used as an additional hard-disk ... Larger plants may want to take advantage of the benefits of networking. Net-working is becoming more and more inexpensive, and is a good way to share data for backup and manipulation. The data...
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A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 12 potx
... important that data be easilyaccessible. File structure should allow data to be imported directly into database orspreadsheet programs. The historical data should be available for access via the ... easier for the novice to work within a single program. d. Historical Data The system should provide a clean and efficient way to store data. Automaticarchiving and backup are desirable features. ... 126 A PRACTICAL GUIDE TO PARTICLE COUNTING on the same graph. In this way, various filter effluents can be compared, or auxiliary data compared with particle count data. It is also useful to have...
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