make database in mongodb
Displaying an Image from a Database in a Web Forms Control
... outline the required tasks: 1. Create a web page that outputs a binary stream containing the image from the database. 2. Create a SQL statement to retrieve the required image from the database ... the OLE image header. For more information, see the online sample code. [ Team LiB ] [ Team LiB ] Recipe 7.7 Displaying an Image from a Database in a Web Forms Control Problem ... Problem You need to display an image from a database column in an ASP.NET control. Solution Fill an ASP.NET Image control from a database field by pointing the ImageUrl property of an Image control...
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Displaying an Image from a Database in a Windows Forms Control
... CurrencyManager class inherits from the BindingManagerBase class and maintains a pointer for the current item in a data source that implements IList, IListSource, or IBindingList. Data sources ... System.Drawing; using System.Windows.Forms; using System.IO; using System.Data; using System.Data.SqlClient; private DataSet ds; private SqlDataAdapter da; private BindingManagerBase ... Recipe 7.8 Displaying an Image from a Database in a Windows Forms Control Problem You need to display an image from a database in a Windows Forms control. Solution Read the image into a byte array...
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Specifying Locking Hints in a SQL Server Database
... to monitor lock activity. For more information about database locks, using locking hints, or monitoring database locks, see Microsoft SQL Server Books Online. [ Team LiB ] // . . . ... is shown in Example 6-39. Example 6-39. File: UsingLockingHintsForPessimisticLockingForm.cs // Namespaces, variables, and constants using System; using System.Configuration; using System.Data; ... determines correct locking; hints should be used only when necessary. Locking hints override the current transaction isolation level for the session. A locking hint is specified following the...
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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. Oneproblem is that initial loading of routines is slow. Also, the ADT routines ... White Plains, N.Y.,June 1980.[KOOI82] Kooi, R. and Frankfurth, D., "Query Optimization in INGRES," IEEE Database Engineering, September 1982.[LITW80] Litwin, W., "Linear Hashing: ... coordinates(0, 1, 0, 1). The following is a compact representation of this request in QUEL:2installation wants at the time the DBMS is installed. In this case, all routines could be linked into...
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Executing Commands that Modify Information in the Database
... Finally, you execute the INSERT statement using the ExecuteNonQuery() method: int numberOfRows = mySqlCommand.ExecuteNonQuery(); The ExecuteNonQuery() method returns an int value that indicates ... mySqlDataReader["CompanyName"] = New Company Number of rows deleted = 1 Executing DDL Statements Using the ExecuteNonQuery() Method In addition to running INSERT, UPDATE, and DELETE statements, you can also use the ... Customers table. DisplayRow() is used in the program to show the result of the INSERT and UPDATE statements. Listing 8.7: EXECUTEINSERTUPDATEDELETE.CS /* ExecuteInsertUpdateDelete.cs illustrates...
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Tài liệu Advances in Database Technology- P1 pptx
... could be obtained through mining or just from in- formation retrieval. Data mining is an important tool in making the web moreintelligent. That is, data mining may be used to mine the data on ... withwork on information systems engineering involving, for example, databases and webservices.E. Bertino et al. (Eds.): EDBT 2004, LNCS 2992, pp. 3–16, 2004.© Springer-Verlag Berlin Heidelberg ... computa-tional origins and information systems engineering aspects have received scantattention. The development within the GRID community of the W3C-inspiredOGSA indicates a willingness to move in a direction...
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Tài liệu Advances in Database Technology- P2 ppt
... spatial index over object locations.Indexing Queries. The second centralized approach to processing spatial continuousqueries on moving objects is by indexing queries. In this approach a spatial index, ... watermark.Energy-Conserving Air Indexes for Nearest Neighbor Search51Fig. 1. Data and Index Organization Using the Interleaving Techniquefor broadcasting along with the data objects [8]. By first examining the indexinformation ... enabling a single linear access of the upper-level index for anyquery point. In addition, to avoid rollback operations in the lower-level index, wetry to maintain each grid cell in a size such...
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Tài liệu Advances in Database Technology- P3 docx
... minimizethe information loss in moving from clustering to clustering This informationloss is given by We can also view the informationloss as the increase in the uncertainty. Recall thatSinceH(A) ... Constrained Indexing and Query Indexing are proposedfor efficient evaluation of this kind of queries at a central location. Several other indexingstructures and algorithms for handling moving ... 69-84.Bradley, P., Fayyad, U., & Reina, C. (1998). Scaling Clustering Algorithms to LargeDatabases. In proceedings of the Int’l Conference on Knowledge Discovery and DataMining. New York, NY, Aug 27-31....
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Tài liệu Advances in Database Technology- P4 pdf
... ciphertext, while, in thesecond, the intermediate index is based upon plaintext and the final index isobtained by encrypting the intermediate index. Based upon characteristics which make encryption ... xor-ing them) to obtain ciphertext.Decryption involves reversing the process: combining the key-stream with theciphertext to obtain the original plaintext. Along with the initial encryption key,additional ... example, in a movie database, we may be interested in discovering clusters of directors or actors,which in turn could help in improving the classification of movie tuples. Given thejoint distribution...
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Tài liệu Advances in Database Technology- P5 pdf
... Preserving Data Mining187We maintain the total number of records in that group. This number isdenoted byWe make the following simple observations:Observation 1: The mean value of attribute in ... appearing in A move fromis done by first randomly extractinga predicate pred from Pred. Let and be the containers involved in pred (forinstance pred makes an equality comparison, such as or an inequality ... predicates in betweenand not involving prefix-matching, whereas with or it isthe number of equality predicates in between and a constant orbetween and a constant not involving prefix-matching. Matrices...
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Tài liệu Advances in Database Technology- P6 docx
... relationaldatabases into an XML format or to store the information in an XML object in a relational database, increasing the cost of e-business development. Moreover,specifying the mapping in the ... Experiences. In Proc.of the Int. Conf. on Very Large Databases (VLDB’02), Hong Kong, China, 2002D. Kossmann, F. Ramsak, S. Rost. Shooting Stars in the Sky: An Online Algorithm forSkyline Queries. In ... DB-to-XML mapping, into severalmodified mappings in order to support clients that require various por-tions of the mapping-defined data. Mapping rewriting has the effect ofreducing the amount...
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