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Download Administering Relational Databases on Microsoft Azure Exam Dumps
NEW QUESTION 23
You have an Azure SQL database named DB1.
You have a table name Table1 that has 20 columns of type CHAR(400). Row compression for Table1 is enabled.
During a database audit, you discover that none of the fields contain more than 150 characters.
You need to ensure that you can apply page compression to Table1.
What should you do?
- A. Configure the columns as sparse.
- B. Change the column type to nvarchar (MAX).
- C. Change the column type to varchar (MAX).
- D. Change the column type to varchar (200).
Answer: D
Explanation:
Reference:
https://www.sqlshack.com/sql-varchar-data-type-deep-dive/
https://36chambers.wordpress.com/2020/06/18/nvarchar-everywhere-a-thought-experiment/
NEW QUESTION 24
You have an Azure SQL database.
Users report that the executions of a stored procedure are slower than usual. You suspect that a regressed query is causing the performance issue.
You need to view the query execution plan to verify whether a regressed query is causing the issue. The solution must minimize effort.
What should you use?
- A. Performance Recommendations in the Azure portal
- B. Extended Events in Microsoft SQL Server Management Studio (SSMS)
- C. Query Performance Insight in the Azure portal
- D. Query Store in Microsoft SQL Server Management Studio (SSMS)
Answer: D
Explanation:
Use the Query Store Page in SQL Server Management Studio.
Query performance regressions caused by execution plan changes can be non-trivial and time consuming to resolve.
Since the Query Store retains multiple execution plans per query, it can enforce policies to direct the Query Processor to use a specific execution plan for a query. This is referred to as plan forcing. Plan forcing in Query Store is provided by using a mechanism similar to the USE PLAN query hint, but it does not require any change in user applications. Plan forcing can resolve a query performance regression caused by a plan change in a very short period of time.
Reference:
https://docs.microsoft.com/en-us/sql/relational-databases/performance/monitoring-performance-by-using-the-query-store
NEW QUESTION 25
You have SQL Server on an Azure virtual machine.
You review the query plan shown in the following exhibit.
For each of the following statements, select yes if the statement is true. Otherwise, select no.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Reference:
https://docs.microsoft.com/en-us/sql/relational-databases/performance/monitoring-performance-by-using-the-query-store
NEW QUESTION 26
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