upc nincs internet 2018 Using Plan Guides in .NET

Printing UPC-A in .NET Using Plan Guides

Using Plan Guides
Make UPC-A In Visual Studio .NET
Using Barcode encoder for .NET Control to generate, create Universal Product Code version A image in .NET applications.
www.OnBarcode.com
UPC A Recognizer In Visual Studio .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Plan guides are a new feature available with SQL Server 2005. This feature enables you to inject query hints into SQL statements without modifying the query itself. This can be useful when troubleshooting problems with third-party applications, and you do not have access to the code. Instead of modifying the query like we did with the USE PLAN query hint, plan guides use an internal system table to track whether plans are attached to certain queries. You create a plan guide using the sp_create_plan_guide system stored procedure. This built-in stored procedure accepts the following parameters:
Barcode Generator In .NET
Using Barcode generator for VS .NET Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Scan Barcode In .NET Framework
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
@name Plan guide name. @stmt Actual SQL statement. You can use SQL Server Profiler to extract the text for the SQL: BatchStarting event. (See Figure 2-5.) You must replace all single quotes with double quotes.
Encode UPC Code In C#
Using Barcode maker for .NET framework Control to generate, create UPC-A Supplement 5 image in .NET framework applications.
www.OnBarcode.com
Making UPCA In .NET Framework
Using Barcode drawer for ASP.NET Control to generate, create GTIN - 12 image in ASP.NET applications.
www.OnBarcode.com
2
GS1 - 12 Creation In VB.NET
Using Barcode maker for .NET Control to generate, create UCC - 12 image in .NET applications.
www.OnBarcode.com
Code 128 Code Set B Drawer In .NET
Using Barcode generation for .NET framework Control to generate, create USS Code 128 image in .NET framework applications.
www.OnBarcode.com
Designing Database Queries
Painting Barcode In VS .NET
Using Barcode maker for VS .NET Control to generate, create barcode image in .NET framework applications.
www.OnBarcode.com
Creating Barcode In .NET
Using Barcode generator for .NET Control to generate, create barcode image in .NET applications.
www.OnBarcode.com
Value this parameter as OBJECT if you are referring to a stored procedure, function, or trigger. Use the value SQL if it is a standalone SQL statement. Use the value TEMPLATE if it applies to any query that uses the same format as the SQL statement in the @stmt parameter. @module_or_batch If you set the @type parameter with a value of OBJECT, then this should contain the schemaname.objectname of that object. If the @type parameter was set with a value of SQL, then this should contain the same statement text specified in @stmt. If the @type parameter was set with a value of TEMPLATE, then this must be set with a NULL. @params Used to specify all parameters and their data types. @hints Used to specify the query hint that applies to this query. You can use the OPTION clause, which is the same clause used in the USE PLAN query hint.
1D Barcode Printer In VS .NET
Using Barcode encoder for .NET Control to generate, create Linear image in VS .NET applications.
www.OnBarcode.com
2/5 Industrial Printer In VS .NET
Using Barcode generator for Visual Studio .NET Control to generate, create Standard 2 of 5 image in .NET framework applications.
www.OnBarcode.com
@type
Printing EAN / UCC - 13 In VS .NET
Using Barcode encoder for Reporting Service Control to generate, create EAN / UCC - 14 image in Reporting Service applications.
www.OnBarcode.com
Encode UCC - 12 In None
Using Barcode generator for Online Control to generate, create GS1-128 image in Online applications.
www.OnBarcode.com
Using Searchable Arguments
Paint PDF-417 2d Barcode In None
Using Barcode printer for Online Control to generate, create PDF417 image in Online applications.
www.OnBarcode.com
Generating Linear In VB.NET
Using Barcode creator for .NET Control to generate, create Linear Barcode image in .NET applications.
www.OnBarcode.com
It is always best for queries to use a WHERE clause because this will restrict the number of results returned and thus enable the query to perform faster. Searchable arguments, also known as SARGs, refer to a WHERE clause that compares a column to a constant value or a variable. This enables the query optimizer to take advantage of an index, which is better than executing a table scan. A table scan should be avoided whenever possible because it indicates that no indexes will be utilized and the database engine will need to scan the entire table. If you encounter a query that is performing poorly, take a look at whether it is using a search argument properly. If it is not, then determine whether the query can be rewritten. You can do a quick check to see what type of operation will be performed by selecting Display Estimated Execution Plan from the Query menu. The query optimizer will attempt to resolve a query so that it utilizes a search argument whenever possible. For example, if you were to display the execution plan for the following query, you would see that it utilizes a clustered index seek:
Generate Barcode In Java
Using Barcode generation for Eclipse BIRT Control to generate, create bar code image in BIRT reports applications.
www.OnBarcode.com
Print Data Matrix ECC200 In Java
Using Barcode generator for Android Control to generate, create Data Matrix image in Android applications.
www.OnBarcode.com
SELECT Name, ProductNumber, ListPrice FROM Production.Product WHERE NOT Color IN ('Black', 'Silver', 'Red')
GS1 - 12 Printer In None
Using Barcode generation for Word Control to generate, create UPC A image in Microsoft Word applications.
www.OnBarcode.com
Code 3 Of 9 Drawer In Java
Using Barcode printer for Java Control to generate, create Code 3 of 9 image in Java applications.
www.OnBarcode.com
Other developers might tell you that this type of operation should be avoided because the NOT keyword is not a valid search argument (SARG). However, the predicate column for the execution plan indicates that the query optimizer knows the WHERE clause should be interpreted as the following:
Lesson 2: Improving Query Performance
[AdventureWorks].[Production].[Product].[Color] <> N'Black' AND [AdventureWorks].[Production].[Product].[Color] <> N'Red' AND [AdventureWorks].[Production].[Product].[Color] <> N'Silver'
Despite this, there are still some operations that can prevent the query optimizer from selecting the optimal execution plan. For example, you should not include a function on a searchable column because this can cause the query optimizer not to utilize an index properly. The following query would still utilize an index, but it would perform an index scan:
SELECT Name, ProductNumber, ListPrice FROM Production.Product WHERE SUBSTRING(name, 1,1) = 'b'
An index scan means that the database engine will need to scan the whole index page. A faster alternative would be to perform an index seek. The index seek will utilize a sort order, so it can access the index faster. The following query will return the same results but will utilize an index seek instead:
SELECT Name, ProductNumber, ListPrice FROM Production.Product WHERE name LIKE 'b%'
In some cases, you might need to join to another table in order to return the correct results. Typically, using a table join or subquery will accomplish this task. Both of the following queries return the same results, display a similar execution plan, and will have a similar resource cost:
SELECT Name, ProductNumber, ListPrice FROM Production.Product WHERE ProductSubCategoryID = (SELECT ProductSubCategoryID FROM Production.ProductSubCategory WHERE Name = 'Mountain Bikes') SELECT p.Name, p.ProductNumber, p.ListPrice FROM Production.Product p JOIN Production.ProductSubCategory ps ON p.ProductSubCategoryID = ps.ProductSubCategoryID WHERE ps.Name = 'Mountain Bikes'
Depending on the needs of your application, either query might be the only way you can accomplish your goal. However, the most efficient way to return the same results is with the following query:
Copyright © OnBarcode.com . All rights reserved.