Access to databases

Bài giảng "Hệ thống thông tin kế toán - Chapter 5: Relational databases" presentation of content: Describe the basic of database, explain what a relational database is and how it organizes data, perform simple queries using the Microsoft Access database,... Invite you to reference.

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We have identified and characterized a thermostable thio-redoxin system in the aerobic hyperthermophilic archaeon AeropyrumpernixK1. Thegene (Accessionno.APE0641) of A. pernixencoding a 37 kDaprotein contains a redox active site motif (CPHC) but its N-terminal extension region (about 200 residues) shows no homologywithin the genome database. A second gene (Accession no. APE1061) has high homology to thioredoxin reductase and encodes a 37 kDa protein with the active site motif (CSVC), and binding sites forFADandNADPH....

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Users and Security Security domain The database administrator defines the names of the users who are allowed to access a database. A security domain defines the settings that apply to the user. Authentication mechanism A user who requires access to the database can be authenticated by one of the following: Data dictionary Operating system Network The means of authentication is specified at the time the user is defined in the database and can be altered later. This lesson covers authentication by database and by operating system only.

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là một trong bốn phần mềm ứng dụng của bộ MicroSoft Office. Là một hệ quản trị cơ sở dữ liệu (DataBase Management System gọi tắc là DBMS) giúp ta lưu trữ, quản lý, khai thác só liệu được lưu trữ một các có tổ chức bên trong máy tinh.

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Theo cảnh báo ngắn gọn của US-CERT đưa ra ngày 12/12, tổ chức này cho biết đã phát hiện các hành vi gửi file Microsoft Access Database (.mdb) được thiết kế đặc biệt cho nạn nhân của tin tặc. Các file .mbd được viết cho mục đích thực thi lệnh trên máy tính, chính vì thế theo khuyến cáo của Microsoft, người dùng không chạy các file này từ những nguồn không an toàn. Symantec cho biết, thông thường các công ty luôn chặn file ...

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Teach Yourself PL/SQL in 21 Days- P16: Welcome to Sams Teach Yourself PL/SQL in 21 Days, Second Edition. The fact that you purchased this book indicates that you have an interest in learning the PL/SQL language, which is Oracle’s relational database procedural programming language. It allows you to develop powerful and complex programs to access and manipulate data in the Oracle8i database. We have attempted to include as many examples of PL/SQL code as possible to illustrate PL/SQL features....

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Teach Yourself PL/SQL in 21 Days- P15: Welcome to Sams Teach Yourself PL/SQL in 21 Days, Second Edition. The fact that you purchased this book indicates that you have an interest in learning the PL/SQL language, which is Oracle’s relational database procedural programming language. It allows you to develop powerful and complex programs to access and manipulate data in the Oracle8i database. We have attempted to include as many examples of PL/SQL code as possible to illustrate PL/SQL features....

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[ Team LiB ] Recipe 2.15 Retrieving Update Errors Problem You want to access all of the error information available after an update fails. Solution Use one of the available properties (such as HasErrors) and methods (such as GetErrors( )) to obtain the error information.

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[ Team LiB ] Recipe 2.12 Retrieving Stored Procedure Return Values Using a DataReader Problem You are using a stored procedure to create a DataReader and need to get the return value. When you try to access the value, it is null. How can you access the return value?

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[ Team LiB ] Recipe 2.20 Retrieving Data from an Oracle Package Problem Given an Oracle package that returns multiple result sets for related tables as REF CURSOR data types, you want to access this data using a DataReader and load the data into a DataSet. Solution Use the data type OracleType.Cursor .

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[ Team LiB ] Recipe 7.13 Loading a Windows PictureBox with Images Stored by Access as OLE Objects Problem You need to display images from a Microsoft Access database in a PictureBox control. Solution Strip the OLE image header that Microsoft Access adds to the image. The sample code contains six event handlers

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[ Team LiB ] Recipe 2.9 Returning an Output Parameter Using a DataReader Problem You want to access an output parameter returned by a stored procedure that you have used to create a DataReader. Solution Add a parameter

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[ Team LiB ] Recipe 10.10 Compacting an Access Database Problem You need to compact or repair an Access database. Solution Use COM interop to the compact the Access database using JRO, or the Process.Start( ) method to compact the database using a command line switch.

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[ Team LiB ] Recipe 10.6 Creating a New Access Database Problem You need to create a new Microsoft Access database. Solution Use ActiveX Database Objects Extensions (ADOX) from .NET through COM interop. You'll need a reference to Microsoft ADO Ext. 2.7 for DDL and Security from the COM tab in Visual Studio

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[ Team LiB ] Recipe 4.3 Getting an AutoNumber Value from Microsoft Access Problem If you add a row into a Microsoft Access table that has an AutoNumber column, the value assigned to the column in the DataTable is replaced by a value generated by the database.

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Connecting to a Secured Access Database Problem You want to connect to a Microsoft Access database that has been secured with user-level security and a workgroup file. Solution Use the Jet OLEDB:System Database attribute in the connection string to specify the path and filename of the workgroup information file or system database.

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[ Team LiB ] Recipe 1.3 Connecting to a Password-Protected Access Database Problem You want to connect to a Microsoft Access database that has a database password. Solution Use the Jet OLEDB:Database Password attribute in the connection string to specify the password.

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[ Team LiB ] Recipe 1.18 Changing the Database for an Open Connection Problem You want to change the database that a connection uses without recreating the connection. Solution Use the ChangeDatabase( ) method to change the database for a connection.

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[ Team LiB ] Recipe 3.9 Finding Rows in a DataView Problem You need to find a row or group of rows in a DataView meeting certain criteria. Solution Use a sorted DataView to find rows using columns that are not part of the primary key. The sample code contains two event handlers: Form.Load Sets up the sample by creating a DataTable containing the Orders table from the Northwind database. A DataView of the table sorted by the CustomerID and EmployeeID is created. Find Button.Click Uses the FindRows( ) method of the DataView to retrieve the array of DataRowView objects...

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[ Team LiB ] Recipe 1.5 Connecting to an Access Databasefrom ASP.NET Problem You know your connection string is correct, but still can't connect to your Microsoft Access database from your ASP.NET application. What are the differences between connecting from a Windows Forms

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