working with data tables in r
Lesson 2 Working with data in a connected environment
Ngày tải lên :
13/05/2014, 12:19
... other DataReader
Explicitly close DataReader after used
DataReader cannot be used for data binding
Using with stored procedure with a return or output parameter, must close DataReader before ...
.Read()
reads a record, and set pointer to the next record
returns true if there are more rows left to be read
dataReader[int i]
dataReader[string colName]
GetValue(int i)
returns ... sequentially read data from a data source
The return results of Command SQL statements (no constructor)
How to use DataReader with data providers?
How to retrieving data using a DataReader?
What...
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Chapter 6 Working with Data in a Connected Environment
Ngày tải lên :
13/05/2014, 12:19
... DataReader
Connection
ConnectionConnection
Connectionn
nn
n
Command
CommandCommand
Commandn
nn
n
DataReader
DataReaderDataReader
DataReadern
nn
n
Open
Which data?
Result
VB.Net 2005 - Chapter 6
24
DataReader Class
Store the information obtained by the command
In stateless stream ... object
Very efficient
Forward-only cursor
Read-only cursor
Dim dr as OLEDBDataReader = cmd.ExecuteReader
Do while dr.Read()
msgbox dr("City").toString
Loop
dr.Close
Datareader and ... Object
Program
Provider
DataSet
DataReader
DataAdapter
Database
Action SQL
Maintain
data
Maintain
data
Get data
Get data
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VB.Net 2005 - Chapter 6
45
Ex. Insert new record
Exit
Save
VB.Net 2005 - Chapter...
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Working with Spatial Data
Ngày tải lên :
05/10/2013, 08:48
... can provide a primary filter of these records, as shown in the following rows
returned by the procedure:
Number_Of_Rows_Selected_By_Primary_Filter 49018
Number_Of_Rows_Selected_By_Internal_Filter ...
The result of the STCrosses() method is 1, indicating that the LineString x crosses over the
LineString y. According to the OGC standards, two LineStrings cross each other if the geometry created ... the points at which
they intersect lie in the boundary (i.e., the ends) of the LineString. In this case, the point (5,5) lies in the
interior of both LineStrings rather than in their boundary,...
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Working with Temporal Data
Ngày tải lên :
05/10/2013, 08:48
...
ã Interval B starts within interval A and ends after interval A.
ã Interval C is the opposite, starting before interval A and ending within.
ã Interval D both starts and ends within interval ... “Managing Bitemporal Data later in this chapter for more
information.
SQL Server’s Date/Time Data Types
The first requirement for successfully dealing with temporal data in SQL Server is an ... date
for intervals that I’d like to discuss is the ability to work with overlapping intervals. Understanding how
to work with overlaps is necessary either for performing overlap-related queries...
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Working with the Fogbow Design and reconfiguration of services and participation in e-Government
Ngày tải lên :
04/11/2013, 20:15
... Swedish Center for Working Life,
Demos Project report no.13, Utbildningsproduktion, Malmö.
Rydhagen, Birgitta (2002) Feminist sanitary Engineering as a Participatory Alternative in
South Africa and ... with the aim of increasing the individual citizen’s
insight into government routines and principles, producing transparency and
providing a presentation of government work processes. Accountability ... original
interpretation based on my interviews with her, extremely active in producing her
own reality.
I could have striven more strongly for accountability while participating in the PS
investigation....
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Tài liệu Working with Primitive Data Types doc
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15/12/2013, 00:15
... and the .NET Framework before we
can do that (we will cover data type conversions in Chapter 11,
“Understanding Parameter Arrays,” and Chapter 19, “Operator
Overloading”).
8. In the Code and ... the window and stop the program.
Control returns to the Visual Studio 2005 programming environment.
Use primitive data types in code
1. Right-click the Form1.cs file in the Solution Explorer ... compile time error
Displaying Primitive Data Type Values
In the following exercise, you'll use a C# program named PrimitiveDataTypes to
demonstrate how several primitive data types work.
Display...
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Tài liệu Create a New Table with Data from Existing Tables doc
Ngày tải lên :
21/01/2014, 12:20
... Windows Form. Then place the controls listed in Table 6.7 with the
following properties set, as displayed in Figure 6.8.
Table 6.7. Control Property Settings for This How-To
Object Property ...
strSQL &= "INTO MyProdAndCat" & vbCrLf
strSQL &= "FROM Categories INNER JOIN Products" & vbCrLf
strSQL &= "ON Categories.CategoryID = Products.CategoryID" ... data table to the data grid's DataSource property
Me.dgResults.DataSource = dtResults
End Sub
Figure 6.8. These results are based on a new table created by the SQL string that is
displayed....
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Tài liệu Working with local data pptx
Ngày tải lên :
25/01/2014, 19:20
... System.Type.GetType("System.String"))
Creating a DataSet
DataTable
DataTable
DataSet
DataSet
Practice: Binding a Control to a DataSet
Binding a control to a DataSet
Binding a control to a DataSet
1
1
Verifying the binding
Verifying ... binding
Verifying the binding
2
2
Reading Data
The ExecuteReader method runs the SQL or stored
procedure and returns a DataReader object
The Read method moves the DataReader to the next
record
Read must ... Practice: Using DataSets to Access Data
Creating and filling a DataSet
Creating and filling a DataSet
1
1
Adding to a DataSet from a form
Adding to a DataSet from a form
2
2
Overview
Using DataSets
Using...
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Tài liệu Working with Dates in Flash docx
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26/01/2014, 11:20
... array to
convert the information to a string value (as discussed in the previous two steps).
17. Insert the following line of script after the line added in Step 16:
18.
19. calendarYear_txt.text ... appropriate representation of 12 a.m. in the 12-hour format. If neither
of the preceding conditions is true, the value of hour is already appropriate for the
12-hour format (3 a.m. is represented ... what's commonly referred to as
military time, where the 24 hours in a day are specified in a range from 0 to
23.
o The getMinutes() method extracts minute data from the currentTime Date
object...
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WORKING WITH ETHNICITY, RACE AND CULTURE IN MENTAL HEALTH doc
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06/03/2014, 02:20
... communicates
verbally and non-verbally
·
third-party information
°
the referral itself
°
gathering information from existing records
°
gathering information from other agencies
·
gathering information from ... gathering information
from what is said and from behaviour
·
gathering information from existing records
·
gathering information from other agencies
·
gathering information from significant others ... interpreted. A
worker may interpret that a service user poses a risk to him- or herself or
others but patterns or themes in breakdowns may go unobserved. Service
users are not asked to explain....
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Working with Men in Health and Social Care ppt
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14/03/2014, 23:20
... be reproduced,
stored or transmitted in any form, or by any means, only with the
prior permission in writing of the publishers, or in the case of
reprographic reproduction, in accordance with ... such dominant cultural masculin-
ities can only be understood discretely or whether there are patterns across
cultures embedded in particular structures. Furthermore, there is rather a
‘straw man’ ... of
their time with men who are problem-free. They are there to arrange care for
or to intervene in some way with men who are in some kind of need or whose
behaviour is causing problems for others. Despite...
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DATA HANDLING IN SCIENCE AND TECHNOLOGY -VOLUME 4 Advanced scientific computing in BASIC with applications in chemistry, biology and pharmacology potx
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22/03/2014, 23:20
... that the programs contained in
this
book are free of error, or are
cmsistmt with any particular standard of merchantibility, or that they
will
meet your requirements for any particular application. ... equilibrium data
References
SI(3rYy
PRonSsING
Classical mthods
Interpolation
Smmthing
Differentiation
Integratim
Spline functions in signal prccessing
Interpolating splines ...
Interpolating splines
Smmthing splines
Fourier transform spectral methods
Continuous Fourier transformation
Discrete Fourier transformation
Application of Fourier transform techniques
Applications...
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CHAPTER 5 ■ WORKING WITH ENTITIES In this example, you use the CreateProductModel method to docx
Ngày tải lên :
18/06/2014, 17:20
... stored procedures that return data? This is where the Model
Browser comes in. Select stored procedures aren’t mapped like their other CRUD brethren. You need to
use the Model Browser for select ... using your new stored procedure.
Using Functions in Queries
With the new stored procedure added, you need to go into the Model Browser so you can map it for
reading. You do that by creating ... chapter.
Stored Procedures in the EDM
The first EDM you built back in Chapter 2 included a few tables and views from the AdventureWorks
database, but it included only a single stored procedure...
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