a a or data - 123doc

Module 6: Deriving a Physical Data Design

... should map directly to tables within a relational database Good logical design is extremely important for good database design Tables can store a wide variety of data A table can contain a name, address, ... of data " " Lead-in Denormalization Transaction support Updating data can be a costly process, especially in large databases Optimizing the physical data design for updates is a common practice ... an intimate understanding of the data and how it will be used Although normalization of data is desirable, too much normalization can have detrimental effects on the data In a normalized database,...

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Binding a Windows DataGrid to Master-Detail Data

Danh mục: Kỹ thuật lập trình

... event handlers: Form.Load Sets up the sample by creating a DataSet containing the Orders and Order Details DataTable objects A DataRelation object is created relating the tables DataAdapter objects ... properties at design time, or by using the DataSource property or SetBindingMethod( ) at runtime Valid data sources for the DataGrid include DataTable, DataSet, DataView, and DataViewManager objects ... DataGrid provides a user interface for the data, navigation between related tables as well as formatting and editing capabilities If a DataGrid is bound to a DataSet containing related tables, and...

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Tài liệu Module 4: Designing a User Data Management Strategy pptx

Danh mục: Quản trị mạng

... be able to: Determine an organization’s current strategy for user data Determine the organizational requirements for user data Categorize user data management needs Identify available user data ... Is User Data? ? What Is User Data? Which User Data Is Currently Stored? ? Which User Data Is Currently Stored? Personal data Personal business data Shared business data Where Is User Data Currently ... needs for data availability, data accessibility, data protection, and data security What are the lower-level technologies that Active Directory and Group Policy can use to provide user data management?...

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Tài liệu Appendix A: Library Database Case Study pdf

Danh mục: Chứng chỉ quốc tế

... once last year? What percentage of all loans eventually becomes overdue? What is the average length of a loan? What are the library’s peak hours for loans? Appendix A: Library Database Case Study ... Appendix A: Library Database Case Study Loan Information The reservation, loan, and loanhist tables contain the library’s loan information The reservation table tracks current reservations for each ... item table has a loanable column Rather than including information from this column in the copy table, the database designer assumes that all copies of a particular item are either loanable or not...

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Tài liệu Activity 4.2: Creating a Logical Data Model ppt

Danh mục: Cơ sở dữ liệu

... Identify verbs or actions that define the relationship between each pair of entities, and label the line with the relationship verb This is the initial ER diagram for the logical data model Answer in ... cardinality and existence characteristics of each of the relationships defined in Exercise ! Identify cardinality For each relationship on your ER diagram, ask the question “How many of the parent ... module to record the cardinality of each relationship and denote the entities as parent or child ! Identify existence ! For each relationship on your ER diagram, ask the question “Can the child...

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Tài liệu Module 4: Deriving a Logical Data Design doc

Danh mục: Chứng chỉ quốc tế

... The Need for a Logical Data Design Slide Objective To discuss the reasons why a logical data design is necessary " A logical data design: $ Translates conceptual data needs into real data requirements ... Logical Data Design Logical Data Design Module 4: Deriving a Logical Data Design Entities and Attributes Activity 4.2: Creating a Logical Data Model Entity/Relationship Modeling Data Relationships ... a Logical Data Design Overview of Data Relationships Slide Objective To introduce data relationships Lead-in Data relationships are an integral component of a logical data model " Represent associations...

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A reliability data base for performance and predictive assessment of electric power systems

Danh mục: Tài liệu khác

... outage, an immediately deferrable forced outage, a deferrable forced outage or a starting failure The time spent in any of the states can be easily calculated from the recorded data and important ... such a curtailment This information can be obtained from a frequency and duration analysis The additional parameters required for such an analysis are the transition rates associated with the appropriate ... performance Statistics are expressed on a "per 100 kilometre-year" (km .a) basis for line-related outages and on a "per terminal-year" (t .a) basis for terminal related outages Outages are also classified...

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Tài liệu Instructor Notes Module 4: Deriving a Logical Data Design pptx

Danh mục: Chứng chỉ quốc tế

... identify the cardinality and existence characteristics of the relationships ! Assign students to small groups and have them create an ER diagram with labeled relationships Then lead a class discussion ... they are the keys to later development of the physical design because they affect both normalization and the data model Be sure to have numerous supplementary examples as backup for the examples ... Instructor Notes Module 4: Deriving a Logical Data Design Activities Activity 4.1: Deriving Entities and Attributes from Data Requirements This activity provides students with a real-world example...

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Tài liệu Instructor Notes Module 6: Deriving a Physical Data Design doc

Danh mục: Chứng chỉ quốc tế

... workbook are generic Actual data types will vary depending on the databases that are used Instructor Notes Module 6: Deriving a Physical Data Design ! Implementing Relationships Again, for many ... logical data design ! Determine the appropriate data types for columns in a table ! Produce a physical data design ! To prepare for the activity ! Complete the activity Activity 6.2: Optimizing a Physical ... Physical Data Design In this exercise, students will evaluate a data design and determine areas in which it could potentially be optimized After the activity, lead a short class discussion so that...

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Tài liệu Activity 6.2: Optimizing a Physical Data Design pptx

Danh mục: Cơ sở dữ liệu

... information to the main SQL Server database daily Create a separate database and table for the client computers that only accept timesheet data Replicate this data to the main database as needed Management ... situation has been identified as a performance problem by the database administrators, and they are requesting a fix as soon as possible (The field is already indexed.) Solutions can vary Denormalize ... Create a separate reporting database that receives replicated information on a periodic basis The security of the client database is too lax What can be done to implement a logon procedure or to...

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Tài liệu Displaying Columns from a Related DataTable doc

Danh mục: Kỹ thuật lập trình

... ConfigurationSettings.AppSettings["Sql_ConnectString"]); DataTable ordersTable = new DataTable(ORDERS_TABLE); da.Fill(ordersTable); ds.Tables.Add(ordersTable); // Fill the OrderDetails table and add it to the DataSet da = new SqlDataAdapter("SELECT ... DataSet ds = new DataSet( ); // Fill the Orders table and add it to the DataSet SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Orders", ConfigurationSettings.AppSettings["Sql_ConnectString"]); ... [Order Details]", ConfigurationSettings.AppSettings["Sql_ConnectString"]); DataTable orderDetailsTable = new DataTable(ORDERDETAILS_TABLE); da.Fill(orderDetailsTable); ds.Tables.Add(orderDetailsTable);...

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Tài liệu Updating a Data Source with Data from a Different Data Source doc

Danh mục: Kỹ thuật lập trình

... tracks changes made to data by maintaining multiple versions of each row allowing the data to be reconciled later to a data source using a DataAdapter The data source to which the DataSet is reconciled ... contains data and schema information within its contained objects, but not information about the provider that was used to retrieve the data or the original source of the data The DataSet tracks ... { // Create a DataSet of the added, modified, and deleted records DataSet dsDelta = dsSource.GetChanges(DataRowState.Added | DataRowState.Modified | DataRowState.Deleted); if (dsDelta != null)...

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Tài liệu Create a Dialog Box to Connect to a New Database, Including Listing Available SQL Servers and Databases pdf

Danh mục: Cơ sở dữ liệu

... database that are within the SQL Server are loaded into the list box called lstDatabases Listing 7.5 modSQLDMORoutines.vb: Retrieving Database Names for a Given SQL Server Function GetSQLDatabases(ByVal ... As Integer Dim oNames As SQLDMO.NameList Dim oSQLApp As New SQLDMO.Application() ' Load available SQL Servers into a NameList ' (those that are able to be seen by the network) oNames = oSQLApp.ListAvailableSQLServers ... Repopulating the List Boxes Based on the Current Category Selected Private Sub lstDatabases_SelectedIndexChanged(ByVal sender As System.Object, _ ByVal e As System.EventArgs) _ Handles lstDatabases.SelectedIndexChanged...

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Tài liệu Module 4: Deriving a Logical Data Design docx

Danh mục: Hệ điều hành

... The Need for a Logical Data Design Slide Objective To discuss the reasons why a logical data design is necessary " A logical data design: $ Translates conceptual data needs into real data requirements ... Logical Data Design Logical Data Design Module 4: Deriving a Logical Data Design Entities and Attributes Activity 4.2: Creating a Logical Data Model Entity/Relationship Modeling Data Relationships ... a Logical Data Design Overview of Data Relationships Slide Objective To introduce data relationships Lead-in Data relationships are an integral component of a logical data model " Represent associations...

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Tài liệu The Total Cost of (Non) Ownership of a NoSQL Database Cloud Service ppt

Danh mục: Cơ sở dữ liệu

... hardware, and no indirect administration costs of managing and scaling your hardware environment That’s because Amazon DynamoDB isn’t database software It’s a database service that handles all ... NoSQL database software hosted on-premises Open source NoSQL database software hosted on Amazon Elastic Compute Cloud (Amazon EC2) with Amazon Elastic Block Storage (Amazon EBS) Amazon DynamoDB (a ... There are no hardware or NoSQL database administration costs  Storage: $219 for 200 GB per month (plus an additional cost of indexed data storage) at a rate of $1 per GB per month (US East Region)...

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Tài liệu Báo cáo khoa học: "A New Dataset and Method for Automatically Grading ESOL Texts" pdf

Danh mục: Báo cáo khoa học

... shows that treating AA as a text classification problem is viable, but the feature types are all fairly shallow, and the approach doesn’t make efficient use of the training data as a separate classifier ... ordinal arrangement of values As our data contains some tied values, we calculate Spearman’s correlation by using Pearson’s correlation on the ranks Table presents the Pearson’s and Spearman’s correlation ... increase, standardised and independent evaluation methods are important We make such a dataset of ESOL examination scripts available1 (see Section for more details), describe our novel approach...

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Tài liệu Building a Spatial Database in PostgreSQL pptx

Danh mục: Cơ sở dữ liệu

... database • Spatial databases were born when people started to treat spatial information as first class database objects Advantages of Spatial Databases Able to treat your spatial data like anything ... like never before What is a Spatial Database? Database that: • Stores spatial objects • Manipulates spatial objects just like other objects in the database What is Spatial data? • Data which describes ... Historically? • In early GIS implementations, spatial data and related attribute information were stored separately The attribute information was in a database (or flat file), while the spatial...

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Tài liệu Systemic Banking Crises: A New Database docx

Danh mục: Cơ sở dữ liệu

... Dominican Republic, Ecuador, Estonia, Finland, Ghana, Indonesia, Jamaica, Japan, Korea, Latvia, Lithuania, Malaysia, Mexico, Nicaragua, Norway, Paraguay, Philippines, Russia, Sri Lanka, Sweden, Thailand, ... reached a global dimension as it became apparent that foreign banks, mainly European, had also played a significant role in the demand for mortgage-related (and in particular subprime mortgages-linked) ... was set up to deal with bank restructuring, and whether or not an asset management company (ASSET MANAGEMENT COMPANY) was set up to take over and manage distressed assets In case an asset management...

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Tài liệu C++ Lab2 Sending the output to a printfile Data Types pptx

Danh mục: Kỹ thuật lập trình

... declare a variable – we call this initializing a variable Or you can read a value from a file or the keyboard Homework: Write a program to find the average of three grades for a student Display ... give you amount of memory saved for an int You can substitute the data type used inside the parenthesis Before manipulating a variable, you must assign a value to it You can assign a value at the ... memory (word varies on different machines) A 32 bit machine will set aside bytes for an int that can hold any value from -2,147,483,648 to +2,147,483,647 A char data type can hold one character...

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Tài liệu C++ Lab 2 Sending the output to a printfile Data Types: Chapter 2 ppt

Danh mục: Kỹ thuật lập trình

... problem What are the known information about this programming assignemnt? There are ten dollars in a quarter roll There are five dollars in a dime roll There are two dollars in a nickel roll And there ... the main int dollar, quarterR, dimeR, nickelR, pennyR, remainder; Variables that are used in the main are declared There are six variables of type integer These variable names (identifiers) stand ... dollars / 10 remainder = dollars % 10 calculate dime rolls and remainder dime_rolls = remainder / remainder = remainder % calculate nickel rolls and remainder nickel_rolls = remainder / remainder...

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