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Case Scenario Answers
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Recognizing QR Code 2d Barcode In C#.NET
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chapter 4: case Scenario answer
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Case Scenario: Improving Query Performance
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The report for the data warehouse loads can be accomplished easily by using either subqueries, CTEs, or a combination of CTEs with ranking functions. Because a CTE combined with a ranking function should provide the best performance, you should use this method. Iteration across a result set can be accomplished using CTEs, which would be much more efficient than a cursor-based solution. Depending upon the specific business problem, you could use the same method to find load gaps in the data warehouse to solve the problems of finding missing data or filling empty seats. You could rewrite the cursors that are calculating sales figures to use subqueries that can provide running totals as well as aggregate data within a group. You can eliminate all the intermediate temporary tables by using derived tables, which can take advantage of the memory available on the machine instead of requiring physical reads and writes to disk.
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chapter 5: case Scenario answer
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Case Scenario: Improving Application Performance
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Most of the problems Fabrikam is having stem from poorly designed applications. The applications should not be generating ad hoc queries to submit to SQL Server. The applications should instead follow code encapsulation best practices used throughout the industry. All the database code needs to be removed from the application and moved into stored procedures. The applications then must be rewritten to access the stored procedures. Once a stable release of an application has been achieved that uses stored procedures, you can then begin the analysis and tuning activities that Fabrikam needs. You can tune the stored procedures in isolation from the applications such that any changes needing to be deployed affect only the stored procedures and do not require an application release. You can prevent the accidental deletion of objects on the production server by implementing a DDL trigger to roll back any DROP event. However, you also need to address the lack of security and remove administrative access from anyone who is not responsible for managing the server running SQL Server. The complex database code should be removed from the application and migrated into stored procedures, functions, and views, as appropriate. This reduces the complexity of the applications and moves the database code into a format that is more easily maintained and managed.
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Recognizing QR Code In None
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5: Case Scenario Answer
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Case Scenario Answers
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chapter 6: case Scenario answer
Code 128 Code Set A Recognizer In .NET Framework
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Case Scenario: Tune Query Performance
To optimize the poorly performing stored procedures, you execute them in SSMS, examine their graphical execution, and consider rewriting their queries as well as redesigning the indexes on the queried tables. To reduce the query execution times for the finance department queries from up to 10 minutes down to a couple of seconds, you most likely need to add more indexes. After adding indexes, test to ensure you haven t compromised performance elsewhere in your applications.
chapter 7: case Scenario answer
Case Scenario: How Should You Store Data
First of all, there probably is no perfect answer to this question. You most likely need to do prototyping to make sure you get it right. However, from the given scenario, the following points are probably the most important to keep in mind:
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Categories are stored in a table. Articles are stored in a table that references the categories table. Given that all articles always have a single title, the table should probably be stored directly in a column in the articles table. Because the content of an article can contain so many different parts, and those parts probably can be nested inside each other (such as a list inside a cell in a table) and given the fact that the order of the different parts is important, the content should probably be stored in a single XML column. Given that what is allowed in the content column probably must be fairly well-defined, you should probably use an XML schema collection to type the content column.
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