Tài liệu Querying Data Asynchronously with Message Queuing docx

... Send a message with the customer DataSet to the queue. mq.Send(ds, customerId); [ Team LiB ] Recipe 2.22 Querying Data Asynchronously with Message Queuing Problem You want to asynchronously ... = new SqlDataAdapter(sqlText, ConfigurationSettings.AppSettings["Sql_ConnectString"]); // Fill the Customer table in the DataSet with customer data. DataSe...

Ngày tải lên: 14/12/2013, 18:16

... Updating Data Asynchronously Using Message Queuing Problem You need to asynchronously update data on a database on system that is not always connected. Solution You must use message queuing ... Refresh the DataSet underlying the DataGrid. ds = (DataSet)msg.Body; dataGrid.DataSource = ds.Tables[CUSTOMERS_TABLE].DefaultView; MessageBox.Show("Retrieved and loade...

Ngày tải lên: 20/10/2013, 12:15

... browsing the data. Optimizing Data Access In this chapter, you have been using a SqlDataSource control to connect to the database and fetch the data. Behind the scenes, the SqlDataSource control ... creates a DataSet. When you bind a Web Server Data control such as GridView to a data source, Visual Studio 2005 generates code that populates the DataSet and displays it in the data...

Ngày tải lên: 21/01/2014, 15:20

... Implementing a Data Mining Process Using Office 2007 187 Introducing the Data Mining Client 188 Importing Data Using the Data Mining Client 189 Data Exploration and Preparation 190 Discretizing Data with ... 135 Creating Data Mining Objects 135 Setting Up Your Data Sources 135 Understanding Data Sources 136 Creating the MovieClick Data Source 137 Using the Data Source V...

Ngày tải lên: 22/01/2014, 22:20

... online transaction processing (OLTP) databases and more than 70 data warehouses. The first step is to pull the relevant data into a database or a data mart where the data analysis is applied. For example, ... enough and must be supplemented with additional data. For example, the log data from the web servers contains only data about web behavior and little (if any) data about...

Ngày tải lên: 27/01/2014, 09:20

... The Data Definition Language (DDL) allows changes to “def- initional” data or metadata. Metadata is the data about the data. Metadata is the definition of data objects such as tables along with their ... SQL, having much to do with why SQL was invented in the first place. In short, SQL database access has evolved with data modeling techniques, Oracle Database, and other databas...

Ngày tải lên: 24/12/2013, 12:17

... 4.1 The Basic SELECT Statement SELECT is the beginning of the SQL command for querying (retrieving) data from a database table, view, or object. Objects are similar to tables, but they have a ... way to ask a question about the data in a database. Thus a SELECT statement is also called a query because it quite literally “queries” or asks questions of a database. There are several use...

Ngày tải lên: 24/12/2013, 12:17

... plan to undo DML changes with a ROLLBACK com- mand, do not tamper with this setting.  ARRAY[SIZE] . Sets the number of rows SQL*Plus retrieves as a block from the database. The default is ... architecture and is com- monly used with Web-based applications. The client tier is your Web browser; the middle tier is the HTTP Server; and the database tier is the Oracle Database 10g Ser...

Ngày tải lên: 24/12/2013, 12:17

... CONCAT('Oracle',' Database 10g') = 'Oracle Database 10g' 'Oracle'||' Database '||'10g' = 'Oracle Database 10g' 'My name ... between different datatypes. 2. The more important and less obvious is that conversion functions allow the combination of different datatypes into expressions to produce a single datatype result....

Ngày tải lên: 24/12/2013, 12:17

... chapter deals with making changes to the database using DML commands to add, change, and remove data. We begin with the INSERT command. Figure 15.5 Two Updates to the Same Row with a SAVEPOINT Label ... Complex and Object Datatypes 16.2 Complex and Object Datatypes From my perspective, a complex datatype is any datatype not containing a single scalar value. Thus a complex data...

Ngày tải lên: 24/12/2013, 12:17