qr code generator c# mvc Lesson 4: Views CHAPTER 5 183 in C#.NET

Make QR Code ISO/IEC18004 in C#.NET Lesson 4: Views CHAPTER 5 183

Lesson 4: Views CHAPTER 5 183
Encode QR Code 2d Barcode In Visual C#.NET
Using Barcode generation for VS .NET Control to generate, create QR image in Visual Studio .NET applications.
www.OnBarcode.com
QR Code Reader In C#
Using Barcode reader for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
an updatable view and causes SQL Server to return to client applications metadata about the view, instead of about the tables underlying the view.
Bar Code Maker In Visual C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create bar code image in Visual Studio .NET applications.
www.OnBarcode.com
Reading Bar Code In Visual C#.NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Modifying Data Through a View
QR Code 2d Barcode Printer In VS .NET
Using Barcode printer for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
www.OnBarcode.com
Create QR-Code In Visual Studio .NET
Using Barcode printer for VS .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
www.OnBarcode.com
You can modify data through a view so long as the following requirements are met:
Draw QR In VB.NET
Using Barcode creator for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in .NET framework applications.
www.OnBarcode.com
Make Code 39 In C#.NET
Using Barcode generation for .NET framework Control to generate, create Code 3/9 image in VS .NET applications.
www.OnBarcode.com
n n n n
Making PDF417 In C#
Using Barcode encoder for Visual Studio .NET Control to generate, create PDF 417 image in VS .NET applications.
www.OnBarcode.com
QR-Code Printer In C#.NET
Using Barcode creation for .NET framework Control to generate, create QR Code image in .NET framework applications.
www.OnBarcode.com
The data modification must reference exactly one table. Columns in the view must reference columns in a table directly. The column cannot be derived from an aggregate. The column cannot be computed as the result of a UNION/UNION ALL, CROSSJOIN, EXCEPT, or INTERSECT. The column being modified cannot be affected by the DISTINCT, GROUP BY, or HAVING clause. The TOP operator is not used.
GS1-128 Creator In Visual C#.NET
Using Barcode encoder for .NET Control to generate, create EAN128 image in .NET applications.
www.OnBarcode.com
MSI Plessey Drawer In C#
Using Barcode drawer for .NET framework Control to generate, create MSI Plessey image in .NET applications.
www.OnBarcode.com
UPDatabLe vieWS
Linear Barcode Encoder In .NET
Using Barcode maker for ASP.NET Control to generate, create 1D Barcode image in ASP.NET applications.
www.OnBarcode.com
Code 128 Code Set C Creator In Visual Basic .NET
Using Barcode creation for .NET Control to generate, create Code 128 Code Set B image in Visual Studio .NET applications.
www.OnBarcode.com
note
Bar Code Reader In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Drawing Code 39 Full ASCII In .NET
Using Barcode creator for ASP.NET Control to generate, create ANSI/AIM Code 39 image in ASP.NET applications.
www.OnBarcode.com
If a view does not meet the requirements to be updatable, you can create an INSTEAD OF trigger on the view. The INSTEAD OF trigger executes for the DML operation you are performing instead of sending the DML through the view.
Scanning UCC.EAN - 128 In VB.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Draw Data Matrix 2d Barcode In Java
Using Barcode creation for Android Control to generate, create Data Matrix image in Android applications.
www.OnBarcode.com
Because the definition of a view can contain a WHERE clause, it s possible to make a modification through the view that is not visible when you retrieve data from the view. The WITH CHECK OPTION clause requires that the only data manipulation that can occur through the view must also be retrievable when you select from the view.
Generating QR In Objective-C
Using Barcode creation for iPad Control to generate, create QR Code ISO/IEC18004 image in iPad applications.
www.OnBarcode.com
Data Matrix Maker In None
Using Barcode creation for Microsoft Excel Control to generate, create Data Matrix image in Microsoft Excel applications.
www.OnBarcode.com
exaM tiP
For the exam, you should understand the requirements to update data through a view.
Partitioned Views
As discussed in 6, Techniques to Improve Query Efficiency, you can implement partitioning to split a large table across multiple storage structures. Instead of using the built-in partitioning feature of SQL Server, you can also partition a large table manually by decomposing a single table into multiple tables with the same structure. When you manually partition a table, you can bring all the data back together using a view. Views that unify multiple tables of the same structure are referred to as partitioned views. A partitioned view implements a UNION ALL of all member tables with the same structure. A partitioned view has the following conditions:
All columns of the member tables should be contained in the select list of the view. Columns in the same ordinal position of each SELECT statement need to be of exactly the same data type and collation.
Programming Microsoft SQL Server with T-SQL User-Defined Stored Procedures, Functions, Triggers, and Views
At least one column that corresponds to a CHECK constraint, unique to each member table, should be in the same ordinal position of each SELECT statement. The constraints must form unique, non-overlapping data sets in each member table. The same column cannot be used multiple times in the select list. The partitioning column, defined by the CHECK constraint, must be part of the primary key. The partitioning column cannot be computed, be a timestamp data type, have a DEFAULT constraint, or be an identity column. The same member table cannot appear twice within the view definition. Member tables cannot have indexes on computed columns. The primary key of each table must have the same number of columns for each member table. All member tables must have the same ANSI_PADDING setting.
n n n
n n n
While this list may seem to be rather restrictive, the intent is to ensure that each member table within a partitioned view contains a unique set of data. If you were allowed to place the same primary key value in multiple member tables, the partitioned view would display duplicates and create confusion within applications, and you would not be able to resolve an update to a single row. One of the advantages of partitioning a table manually is that you can use additional hardware resources that are not available to the built-in partitioning feature. Because manually partitioning a table produces multiple member tables, you can decide which database and SQL Server instance each table resides within. When you split member tables of a partitioned view across SQL Server instances, you create a special case called a distributed partitioned view. A distributed partitioned view has much the same structure as a partitioned view, except each member table is referenced with a four-part name and uses linked servers to combine all the member tables.
Copyright © OnBarcode.com . All rights reserved.