Lesson 5: Managing Partitions in Visual Studio .NET

Creator PDF417 in Visual Studio .NET Lesson 5: Managing Partitions

Lesson 5: Managing Partitions
Printing PDF-417 2d Barcode In .NET Framework
Using Barcode encoder for Visual Studio .NET Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
Decoding PDF417 In .NET
Using Barcode decoder for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
10. View the partitions on the t1 table by executing the following commands:
Barcode Maker In VS .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Bar Code Reader In .NET Framework
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
SELECT * FROM sys.partitions WHERE object_id = OBJECT_ID('dbo.t1') SELECT $partition.partfunc(id) AS [PartitionNum], count(*) [NumRows] FROM dbo.t1 GROUP BY $partition.partfunc(id) ORDER BY $partition.partfunc(id) GO
Making PDF417 In Visual C#
Using Barcode generator for Visual Studio .NET Control to generate, create PDF 417 image in VS .NET applications.
www.OnBarcode.com
PDF 417 Creation In .NET
Using Barcode printer for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
www.OnBarcode.com
11. Verify the number of rows in the two tables at this point as well as the MIN and MAX values by executing the following queries:
PDF417 Creator In Visual Basic .NET
Using Barcode creator for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Code 128 Code Set B Generation In .NET Framework
Using Barcode creation for VS .NET Control to generate, create Code 128B image in VS .NET applications.
www.OnBarcode.com
SELECT COUNT(*), MIN(id), MAX(id) FROM dbo.t2 GO SELECT COUNT(*), MIN(id), MAX(id) FROM dbo.t1 GO
Barcode Maker In VS .NET
Using Barcode maker for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Data Matrix Printer In .NET
Using Barcode generator for .NET Control to generate, create Data Matrix ECC200 image in Visual Studio .NET applications.
www.OnBarcode.com
12. Now add the rows in t2 to t1 by executing the following command:
GS1 DataBar Truncated Generation In VS .NET
Using Barcode generator for Visual Studio .NET Control to generate, create DataBar image in Visual Studio .NET applications.
www.OnBarcode.com
Printing USD-3 In Visual Studio .NET
Using Barcode creation for .NET framework Control to generate, create USD-3 image in .NET applications.
www.OnBarcode.com
/*Now, instead of performing a heavy insert operation to move data from the staging table to the warehouse table, use a partition feature to move the data in table t2 into the empty partition in table t1. This is a full data swap. At the end of this operation, which is infinitely scalable, nearly instantaneous, and incurs ZERO locking overhead, table t2 will be empty and table t1 will contain its original data plus the data that was loaded into t2.*/ ALTER TABLE dbo.t2 SWITCH TO dbo.t1 PARTITION 4 GO
Printing EAN-13 Supplement 5 In Visual Basic .NET
Using Barcode maker for Visual Studio .NET Control to generate, create GTIN - 13 image in VS .NET applications.
www.OnBarcode.com
EAN / UCC - 13 Maker In None
Using Barcode creation for Excel Control to generate, create EAN13 image in Office Excel applications.
www.OnBarcode.com
13. Verify the number of rows in the two tables at this point as well as the MIN and MAX values by executing the following queries:
Code-39 Generator In Objective-C
Using Barcode creation for iPad Control to generate, create USS Code 39 image in iPad applications.
www.OnBarcode.com
Quick Response Code Creation In Java
Using Barcode printer for Java Control to generate, create QR Code 2d barcode image in Java applications.
www.OnBarcode.com
SELECT COUNT(*), MIN(id), MAX(id) FROM dbo.t2 GO SELECT COUNT(*), MIN(id), MAX(id) FROM dbo.t1 GO
Barcode Encoder In None
Using Barcode generator for Software Control to generate, create barcode image in Software applications.
www.OnBarcode.com
Data Matrix ECC200 Encoder In .NET
Using Barcode creation for ASP.NET Control to generate, create DataMatrix image in ASP.NET applications.
www.OnBarcode.com
Lesson Summary
Bar Code Creator In None
Using Barcode drawer for Office Excel Control to generate, create bar code image in Office Excel applications.
www.OnBarcode.com
EAN / UCC - 13 Reader In Visual C#
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
You use SPLIT to introduce a new boundary point into a partition function. You use MERGE to remove a boundary point from a partition function. The most powerful partitioning operator is SWITCH. As long as a table and its associated indexes are aligned, you can use SWITCH to either add an entire partition already populated with data to a table or to remove all the data from a table that corresponds to a particular partition. The SWITCH operation is infinitely scalable and does not incur any locking overhead on the table.
6
Creating Partitions
Lesson Review
The following questions are intended to reinforce key information presented in this lesson. The questions are also available on the companion CD if you prefer to review them in electronic form.
NOTE
Answers
Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.
Which operator do you use to move partitions between tables A. SWITCH B. MERGE C. SPLIT D. INTERSECT
6 Review
Review
To further practice and reinforce the skills you learned in this chapter, you can
Review the chapter summary. Review the list of key terms introduced in this chapter. Complete the case scenario. This scenario sets up a real-world situation involving the topics of this chapter and asks you to create a solution. Complete the suggested practices. Take a practice test.
Summary
The partitioning capability of SQL Server 2005 enables you to divide the data in a table, index, or indexed view into multiple filegroups based on user-defined criteria. To partition a table, index, or indexed view, you perform the following tasks: 1. Create a partition function. 2. Create a partition scheme mapped to a partition function. 3. Create a table or index mapped to the partition scheme.
You can use the $PARTITION function to determine the number of a partition that contains a specific value or to restrict a query to a particular partition. To manage partitioning, SQL Server provides the following operators: SPLIT, to introduce a new boundary point into a partition function; MERGE, to remove a boundary point from a partition function, and SWITCH, to scalably add a set of rows to a table or remove a set of rows from a table.
Key Terms
Do you know what these key terms mean You can check your answers by looking up the terms in the glossary at the end of the book.
$PARTITION alignment boundary points
6 Review
MERGE partition function partition scheme SPLIT SWITCH
Case Scenario: Archiving Data
In the following case scenario, you will apply what you ve learned in this chapter. You can find answers to these questions in the Answers section at the end of this book. Contoso Limited, a health care company located in Bothell, WA, manages patient claims data. The company keeps claims in the online transaction processing (OLTP) database for 12 months before archiving them to a separate server used for research. How can you design the process of archiving data from the Claims table in the OLTP database to the Research database on a separate server without causing locking contention in the table
Copyright © OnBarcode.com . All rights reserved.