emerging conventions in twitter data
Emerging Security Issues In Modern Data Management Systems And Applications
... Supporting Layer Visualization, Collaborative Computing, Mobile Computing, Knowledge-based Systems Layer 3: information extraction & sharing Data Warehousing, Data Mining, Internet DBs, ... results Data source 1: Information about activities in China (Unclassified) Data source 2: Information about activities in USA (Unclassified) Data source 3: Information about activities in Taiwan ... (Secret) Combining data sources 1, and 3, the resulting information is “Top Secret” Figure 3: An inference problem example There are two main approaches to addressing the inference problem in MLS/DBMSs:...
- 9
- 276
- 0
Some studies on a probabilistic framework for finding object-oriented information in unstructured data
... contribution Bearing in mind the importance of searching information on the Web, studies have shown that current search engine is not suitable for finding object in a specific domain on the Internet ... relational approach to incrementally extracting and querying structure in un-structured data In VLDB 2007 [11] Ian H Witten and Eibe Frank Data Mining: Practical machine learning tools and techniques ... probabilistic framework for finding object-oriented information in unstructured data This chapter also gives their advantages and shortcoming in solving object search problem Chapter introduces our general...
- 51
- 393
- 0
Inclusion of new types in relational database systems
... described in [ONG84] Our initial experience with the system is that dynamic linking is not preferable to static linking One problem is that initial loading of routines is slow Also, the ADT routines ... number of index keys in an index number of pages in the index the constant appearing in: rel-name.field-name OPR value the maximum value in the key range if known the minimum value in the key ... an installation wants at the time the DBMS is installed In this case, all routines could be linked into the run time system at system installation time by the linker provided by the operating...
- 19
- 378
- 0
Executing Commands that Modify Information in the Database
... use the ExecuteNonQuery() method to run INSERT, UPDATE, and DELETE statements */ using System; using System .Data; using System .Data. SqlClient; class ExecuteInsertUpdateDelete { public static void ... while (mySqlDataReader.Read()) { Console.WriteLine("mySqlDataReader[\" CustomerID\"] = " + mySqlDataReader["CustomerID"]); Console.WriteLine("mySqlDataReader[\" CompanyName\"] = " + mySqlDataReader["CompanyName"]); ... mySqlDataReader["CustomerID"] = J2COM mySqlDataReader["CompanyName"] = New Company Number of rows deleted = Executing DDL Statements Using the ExecuteNonQuery() Method In addition to running INSERT,...
- 8
- 294
- 0
Tài liệu Finding DataRowView Objects in a DataView docx
... index 1, the Find() method returns Note DataRowView objects in a DataView start at index Therefore, BSBEV occurs at index Finding DataRowView Objects Using the FindRows() Method The FindRows() method ... DataRowView Listing 13.2 shows a program that uses the Find() and FindRows() methods Listing 13.2: FINDINGDATAROWVIEWS.CS /* FindingDataRowViews.cs illustrates the use of the Find() and FindRows() ... FindRows() methods of a DataView to find DataRowView objects */ using System; using System .Data; using System .Data. SqlClient; class FindingDataRowViews { public static void Main() { SqlConnection...
- 5
- 494
- 0
Tài liệu Finding, Filtering, and Sorting Rows in a DataTable ppt
... DESC", DataViewRowState.OriginalRows); foreach (DataRow myDataRow in productDataRows) { foreach (DataColumn myDataColumn in productsDataTable.Columns) { Console.WriteLine(myDataColumn + "= " + myDataRow[myDataColumn]); ... Console.WriteLine("Using the Find() method to locate DataRow object " + "with a ProductID of 3"); DataRow productDataRow = productsDataTable.Rows.Find("3"); foreach (DataColumn myDataColumn in productsDataTable.Columns) ... 10248, 11 }; DataRow orderDetailDataRow = orderDetailsDataTable.Rows.Find(orderDetails); Filtering and Sorting DataRow Objects in a DataTable To filter and sort the DataRow objects in a DataTable,...
- 7
- 498
- 0
Tài liệu Accessing Deleted Rows in a DataTable pptx
... sample code contains three event handlers: Form.Load Sets up the sample by creating a DataTable containing Orders data from Northwind A view containing the Current rows is bound to a data grid on ... default when accessing rows in a DataTable or in a DataView The solution demonstrates an approach for getting Deleted rows from both a DataTable and a DataView Deleted rows include only those ... using System; using System.Configuration; using System.Text; using System .Data; using System .Data. SqlClient; private DataView dv; // private void AccessDataSetDeletedRowsForm_Load(object...
- 10
- 532
- 0
Tài liệu Selecting the Top n Rows in a DataTable doc
... // Fill the Orders table SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Orders", ConfigurationSettings.AppSettings["Sql_ConnectString"]); DataTable dt = new DataTable(ORDERS_TABLE); da.Fill(dt); ... when making non-numeric comparisons in the filter expression At this point, we are done unless there can be more than one instance of the value in the nth record, as is the case with Freight In this ... filter records in a DataTable or DataView, there is no method in either class to select the top n rows The procedure to get the user-specified top n rows with the largest Freight value involves several...
- 4
- 332
- 0
Tài liệu Finding Rows in a DataView doc
... source table with schema and data SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Orders", ConfigurationSettings.AppSettings["Sql_ConnectString"]); DataTable dt = new DataTable("Orders"); da.FillSchema(dt, ... foundRows.Length + Environment.NewLine); } resultTextBox.Text = result.ToString( ); } Discussion The Find( ) and FindRows( ) methods of the DataView search for rows in a DataView using its sort key values ... explicitly set Setting the Sort property of the DataView to a string containing one or more column names followed by nothing, or ASC for an ascending sort, or by DESC for a descending sort Use commas...
- 4
- 424
- 0
Tài liệu Modifying Rows in a DataTable phần 1 ppt
... to // create a new DataRow Console.WriteLine("Calling myDataTable.NewRow()"); DataRow myNewDataRow = myDataTable.NewRow(); Console.WriteLine("myNewDataRow.RowState = " + myNewDataRow.RowState); ... object named myDataSet and populates it by calling mySqlDataAdapter.Fill(): DataSet myDataSet = new DataSet(); mySqlConnection.Open(); int numOfRows = mySqlDataAdapter.Fill(myDataSet, "Customers"); ... void AddDataRow( DataTable myDataTable, SqlDataAdapter mySqlDataAdapter, SqlConnection mySqlConnection ) { Console.WriteLine("\nIn AddDataRow()"); // step 1: use the NewRow() method of the DataTable...
- 7
- 450
- 1
Tài liệu Modifying Rows in a DataTable phần 2 docx
... DisplayDataRow( DataRow myDataRow, DataTable myDataTable) { Console.WriteLine("\nIn DisplayDataRow()"); foreach (DataColumn myDataColumn in myDataTable.Columns) { Console.WriteLine(myDataColumn ... DisplayDataRow() is as follows: In AddDataRow() Calling myDataTable.NewRow() myNewDataRow.RowState = Detached Calling myDataTable.Rows.Add() myNewDataRow.RowState = Added Calling mySqlDataAdapter.Update() ... affected by the method call In this example, one is returned since one row was added Modifying a DataRow in a DataTable To modify a DataRow in a DataTable, you use the following steps: Set the PrimaryKey...
- 7
- 391
- 1
Tài liệu Managing time in relational databases- P1 ppt
... pipeline datasets are contained in the single table that is their destination or their point of origin In this world, maintaining data is a “submit it and forget it” activity, not one in which maintenance ... along inflow pipelines, and posted transactions as data destined for some kind of logfile, and as moving towards that destination along outflow pipelines So if we can bring pending transactions into ... of InBase, Inc., has more than 24 years of experience in IT, specializing in enterprise data architecture, including the logical and physical modeling of very large database (VLDB) systems in...
- 20
- 372
- 1
Tài liệu Managing time in relational databases- P2 pptx
... when brought on-line and assembled into a single database instance, and data marts are the form that transaction logs took when brought online and assembled into their database instances The former ... management losing faith in data warehouse projects As these large projects fell increasingly behind schedule and rose increasingly over budget— something large projects tend to do—the pressure increased ... magnitude, the amount of data contained in those terabyte-sized fact tables themselves Since including uni-temporal or bi-temporal data in the dimensions of a data mart would increase the Chapter...
- 20
- 399
- 1
Tài liệu Managing time in relational databases- P3 doc
... that point in time forward to the point in time we are interested in But the defining feature of reconstructable methods is not the movement of data from off-line to on-line storage The defining ... waiting for the data, and the decisions delayed until the data becomes available In an increasingly fast-paced business world, the opportunity cost of delays in accessing data is increasingly ... partitioning of the former We think that the most important distinction among methods of managing queryable data is the distinction between data about things and data about events Things are...
- 20
- 436
- 1
Tài liệu Managing time in relational databases- P4 pptx
... Chapter THE ORIGINS OF ASSERTED VERSIONING: COMPUTER SCIENCE RESEARCH which contains data destined for production tables are inflow pipeline datasets Pipeline datasets which contain data derived ... lacking a standard for the PERIOD datatype, we will continue the practice of defining periods of time in terms of their begin and end points in time 59 60 Chapter THE ORIGINS OF ASSERTED VERSIONING: ... applied to a database by also internalizing them within their target tables In this book, we will show how the use of these internalized managed objects reduces the costs of maintaining databases...
- 20
- 420
- 1
Tài liệu Managing time in relational databases- P5 pptx
... one kind of internalized pipeline dataset, and the internalization of pipeline datasets can eliminate a large part of the IT maintenance budget by eliminating the need to manage pipeline datasets ... granularity PERIOD datatype point in time time period episode managed object object pipeline dataset inflow pipeline dataset internalization of pipeline datasets outflow pipeline dataset replace ... perhaps joining data that the production queries did not have to join, perhaps assembling intermediate results and then combining those intermediate results in various complicated ways In short,...
- 20
- 420
- 1
Tài liệu Managing time in relational databases- P6 pptx
... have been using is inadequate, because it only allows us to pick out a “when in effect” point in time We also need to pick out a “when in the life of the data in the table” point in time And ... by imposing bi-temporal semantic constraints on bi-temporal data as that data is maintained, Asserted Versioning makes queries against its tables nearly as easy to write as queries against conventional ... versioning to the next versioning best practice—temporal gap versioning 85 86 Chapter THE ORIGINS OF ASSERTED VERSIONING: IT BEST PRACTICES Temporal Gap Versioning Let’s begin by looking at the...
- 20
- 485
- 1
Tài liệu Managing time in relational databases- P7 pdf
... the business data in a row is no longer in effect In other words, the date which is one clock tick past the last date on which the business data in a row is in effect Asr-beg Assertion begin date ... retrieve data from any or all Chapter THE CORE CONCEPTS OF ASSERTED VERSIONING of those nine categories, and that find all of that data in the same tables that, in today’s databases, contain only ... insert, update or delete transactions, it will seem to them that they are maintaining data in a conventional table This maintenance is not done by writing SQL transactions; it is done by making...
- 20
- 419
- 1
Tài liệu Managing time in relational databases- P8 pptx
... effective end date which, in this case, is May 2010 In these boxes that line up one under the other, the business data in the rows may or may not be identical If the business data is identical, then ... misinterpretation, on the maintenance side of things, is minimized But what about the query side of things? What about looking at the data in an asserted version table? How can this data be presented so ... distinguished However, in our Asserted Versioning implementation of bi-temporal data management, it is valid to create a row with an assertion begin date in the future Thus, for Asserted Versioning,...
- 20
- 430
- 1
Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam xác định các mục tiêu của chương trình xác định các nguyên tắc biên soạn khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản khảo sát chương trình đào tạo gắn với các giáo trình cụ thể tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct phát huy những thành tựu công nghệ mới nhất được áp dụng vào công tác dạy và học ngoại ngữ hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008