... Team LiB ]
Recipe 9.5 PerformingaBulkInsertwithSQLServer
Problem
Given many records in an XML file that you need to add to aSQLServer 2000 database,
you need to perform abulkinsert ... a XML bulk load operation. The example defines an optional error log
file, where the default is an empty string meaning that no error log is created.
You can bulk load data into multiple parent-child ... parent-child tables at the same time, a feature that is
not available in the OpenXML Transact -SQL extension.
For information about the XML Bulk Load component and its methods and properties,...
... the
DataSet
and the
data source. The
DataAdapter
is responsible for retrieving the data from the
Command
object
and populating the
DataSet
with the data returned. The
DataAdapter
is also ... performance — As any developer knows, performance can make or break almost
any application. No matter how much a data access layer may simplify accessing the data,
it absolutely must perform nearly ... your database server — for example, a table can only be a table, so why bother to name it as
such? Tables should be named with plurals, such as
Orders
instead of
Order
. Treat each row of a table...
... 88
Manually Populating a DataSet 89
Using DataAdapters 89
Using DataReaders 90
DataTable 90
RowState 91
DataView 91
Serialization 92
DataTableReader 93
Streaming 93
Namespace Qualified Tables 94
Indexing ... Engine 94
DataSet, DataTable, DataReader, or an Object? 95
Showing Data to Users without Any Manipulation 95
Editing Data That Lives in One Table 95
Editing Data Spread across More Than One Table 95
02_584375 ... Chance of Collisions Is High 96
Getting One Value from a Database 96
Summary 96
For More Information 96
Chapter 4: Standard Data Types 97
Data Types in SQLServer 98
CHAR (CHARACTER) 98
VARCHAR...
... ConfigurationSettings.AppSettings[" ;Sql_ Msde_ConnectString"]);
Manager and Query Analyzer are also shared.
The System.Data.SqlClient class cannot automatically discover the port number of a
named instance of SQLServer ... understand what aSQLServer or MSDE named instance is and how to
connect to one. The sample code contains a single event handler:
Connect Button.Click
Creates and opens a connection to a named ...
[ Team LiB ]
Recipe 1.7 Connecting to a Named Instance of SQLServer or Microsoft Data
Engine (MSDE)
Problem
You want to connect to a named instance of aSQLServer or Microsoft Data Engine...
... shown in Example 9-14
.
Example 9-14. File: BinaryDataForm.cs
// Namespaces, variables, and constants
SqlDbType.Image parameter and pass in the BLOB as a Byte array.
•
Create a DataRow and define ... Create parameter for insert command.
SqlParameter prm;
if(image != null)
{
// Add a parameter for the image binary data.
prm = new SqlParameter("@BlobData", SqlDbType.VarBinary, ... DataReader has an overload that takes
an argument from the CommandBehavior enumeration.
Passing the value CommandBehavior.SequentialAccess causes the DataReader to
load the data sequentially as it...
... string is passed to a DataAdapter control, filling a data table. The
data is then displayed when the data source of the DataGrid control is set to the data
table.
Comments
You can enhance this ... the txtSQLString text and create a data table; then set the
' data source of the data grid.
odaDisplay = New OleDb.OleDbDataAdapter(Me.txtSQLString.Text,
mcnn)
odaDisplay.Fill(dtDisplay) ... btnView_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles btnView.Click
Dim odaDisplay As OleDb.OleDbDataAdapter
Dim dtDisplay As New DataTable()
Try
' Take...
... AuthID First Name Last Name
A1
John Brown
A2
Matthew Bortniker
A3
Rick Johnson
A4
Peter Wright
A5
James Moon
AuthorBook
BookID
AuthID
1 A1
2 A2
2 A3
3 A4
3 A5
3 A1
Ngoài ra một trong ... and jobs).
Cấu Trúc Vật Lý C a Một SQLServer Database
Mỗi một database trong SQLServer đều ch a ít nhất một data file chính
(primary), có thể có thêm một hay nhiều data file phụ (Secondary) ... động lại
SQL Server hay khi ta disconnect.
• Model : Database này đóng vai trò như một bảng kẻm (template) cho các
database khác. Ngh a là khi một user database được tạo ra thì SQLServer
sẽ...
... (template) cho các database
khác. Ngh a là khi một user database được tạo ra thì SQLServer sẽ copy toàn bộ các
system objects (tables, stored procedures ) từ Model database sang database mới
v a ... (SQL) Server nào đó là ta nói đến một Instance c a
SQLServer 2000, thông thường đó là Default Instance. Một Instance c aSQLServer 2000
có 4 system databases và một hay nhiều user database. ... thay đổi xảy ra trong database.
Quá trình này diễn ra như sau: đầu tiên khi có một sự thay đổi data như Insert, Update,
Delete được yêu cầu từ các ứng dụng, SQLServer sẽ tải (load) data page...
... system
administrator (sa) account. This account is available so you can authenticate as a “sysadmin”
via SQLServer Authentication. When you use only the Windows Authentication Mode the sa
account ... one for SQLServer and
one for the SQLServer Agent. The SQLServer account is used by the SQL database engine
which provides all the database related services. The SQLServer Agent account ... provided protection if any portion of the server failed, but there were no load-balancing
capabilities. Windows 2000 Advanced Server and Datacenter Server add a “load-balancing”
capability to clustering....