070-464 無料問題集「Microsoft Developing Microsoft SQL Server Databases」
Your network contains a server named Server1 that runs SQL Server 2012. Server1 contains an instance named Instance1. Instance1 contains a database named ContentDatabase.
ContentDatabase uses transaction log backups.
The recovery model of ContentDatabase is set to FULL.
You need to shrink the ContentDatabase_Log log file to 10 MB. The solution must ensure that you can continue to back up the transaction log.
Which three code segments should you execute?
To answer, move the appropriate code segments from the list of code segments to the answer area and arrange them in the correct order.
ContentDatabase uses transaction log backups.
The recovery model of ContentDatabase is set to FULL.
You need to shrink the ContentDatabase_Log log file to 10 MB. The solution must ensure that you can continue to back up the transaction log.
Which three code segments should you execute?
To answer, move the appropriate code segments from the list of code segments to the answer area and arrange them in the correct order.
正解：
Explanation:
Note:
* Shrinking a log file to a specified target size
The following example shrinks the log file in the AdventureWorks database to 1 MB. To allow the DBCC SHRINKFILE command to shrink the file, the file is first truncated by setting the database recovery model to SIMPLE.
Transact-SQL
USE AdventureWorks2012;
GO
-- Truncate the log by changing the database recovery model to SIMPLE.
ALTER DATABASE AdventureWorks2012
SET RECOVERY SIMPLE;
GO
-- Shrink the truncated log file to 1 MB.
DBCC SHRINKFILE (AdventureWorks2012_Log, 1);
GO
-- Reset the database recovery model.
ALTER DATABASE AdventureWorks2012
SET RECOVERY FULL;
GO
* If the log file does not shrink (after dbcc shrinkfile)
Typically it is the log file that appears not to shrink. This is usually the result of a log file that has notbeen truncated. You can truncate the log by setting the database recovery model to SIMPLE, or bybacking up the log and then running the DBCC SHRINKFILE operation again.
* DBCC SHRINKFILEShrinks the size of the specified data or log file for the current database, or empties a file by moving thedata from the specified file to other files in the same filegroup, allowing the file to be removed from thedatabase.
Arguments include:
target_size
Is the size for the file in megabytes, expressed as an integer.
You create a table named Customers by using the following code segment:
You create a non-clustered index named IX_Name on the name column.
You write the following query to retrieve all of the customers that have a name that starts with the letters SMI:
You discover that the query performs a table scan.
You need to ensure that the query uses the index.
What should you do?
You create a non-clustered index named IX_Name on the name column.
You write the following query to retrieve all of the customers that have a name that starts with the letters SMI:
You discover that the query performs a table scan.
You need to ensure that the query uses the index.
What should you do?
正解：D
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You have a database that contains a user-defined function named Schema1.Udf1 and two tables named Schema1.Table1 and Schema1.Table2.
Schema1.Table1 has 1 million rows. The schema for Schema1.Table1 is configured as shown in the following table.
Schema1.Udf1 was defined by using the following code:
You need to write a query that will contain the following columns:
* Country
* CountryID
* CustomerName
The solution must meet the following requirements:
* Rows must be returned only if the function returns data.
* The amount of time it takes the query to execute must be minimized.
Which query should you use?
Schema1.Table1 has 1 million rows. The schema for Schema1.Table1 is configured as shown in the following table.
Schema1.Udf1 was defined by using the following code:
You need to write a query that will contain the following columns:
* Country
* CountryID
* CustomerName
The solution must meet the following requirements:
* Rows must be returned only if the function returns data.
* The amount of time it takes the query to execute must be minimized.
Which query should you use?
正解：B
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You are creating a table to support an application that will cache data outside of SQL Server.
The application will detect whether cached values were changed before it updates the values.
You need to create the table, and then verify that you can insert a row into the table.
Which code segment should you use?
The application will detect whether cached values were changed before it updates the values.
You need to create the table, and then verify that you can insert a row into the table.
Which code segment should you use?
正解：C
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解説: (JPNTest メンバーにのみ表示されます)
You have a database named database1. Each table in database1 has one index per column.
Users often report that creating items takes a long time.
You need to perform the following maintenance tasks:
Identify unused indexes.
Identify indexes that need to be defragmented.
What should you use?
To answer, drag the appropriate function to the correct management task in the answer area. (Answer choices may be used once, more than once, or not at all.)
Users often report that creating items takes a long time.
You need to perform the following maintenance tasks:
Identify unused indexes.
Identify indexes that need to be defragmented.
What should you use?
To answer, drag the appropriate function to the correct management task in the answer area. (Answer choices may be used once, more than once, or not at all.)
正解：
Explanation:
Note:
* sys.dm_db_index_usage_stats
Returns counts of different types of index operations and the time each type of operation was last performed.
* sys.dm_db_index_physical_stats
Returns size and fragmentation information for the data and indexes of the specified table or view.