31 Questions
What is the primary benefit of partitioning in dedicated SQL pool?
Increasing data loading efficiency
Which type of column is commonly used for creating table partitions in dedicated SQL pool?
Date column
In dedicated SQL pool, which types of tables support partitioning?
All table types
What is a key factor that determines whether partitioning benefits data maintenance and query performance?
The way data is loaded and the column chosen for partitioning
Which distribution types support partitioning in dedicated SQL pool?
Both hash and round robin distributed
How can partition switching benefit data maintenance in dedicated SQL pool?
It enables quick removal or replacement of a section of a table
What is the primary benefit of partitioning a table in a dedicated SQL pool?
Reduced storage requirements by deleting old data partitions
Which of the following statements about partition sizing in dedicated SQL pools is correct?
For clustered columnstore tables, a minimum of 1 million rows per distribution and partition is recommended
How does partitioning in dedicated SQL pools differ from SQL Server?
Partitioning functions and schemes are not used in dedicated SQL pools, unlike SQL Server
What is the recommended approach for removing old data from a partitioned table in a dedicated SQL pool?
Drop the entire oldest partition using a DROP PARTITION statement
In the context of partitioning in dedicated SQL pools, what is the purpose of distributions?
Distributions are used to divide the data across multiple compute nodes for parallel processing
Which of the following statements about partitioning in dedicated SQL pools is correct?
Partitioning can improve query performance, but the benefits are less significant with clustered columnstore indexes
What is the recommended approach for assessing the quality of clustered columnstore indexes in partitioned tables?
Query the sys.dm_db_column_store_row_group_operational_stats dynamic management view
What is the purpose of the SQL provided in the documentation for migrating partitions from SQL Server?
To determine the number of rows in each partition of a partitioned SQL Server table
In the context of partitioning in dedicated SQL pools, what is the significance of the 60 distributions created by the system?
It defines the number of compute nodes across which the data will be distributed
Which of the following statements about partitioning in dedicated SQL pools is incorrect?
Partitioning is only beneficial for tables with a large number of rows, typically billions of rows
What is the primary purpose of partition switching in dedicated SQL pools?
To load new data into partitions without locking contention
Which condition must be met for a successful partition switch between two tables?
The partition boundaries must be aligned between the tables
When splitting a partition that contains data in a table with a clustered columnstore index, what is the recommended approach?
Use a CREATE TABLE AS SELECT (CTAS) statement to create a new table with the desired partition boundaries
If a partition split fails due to a non-empty partition in a columnstore table, what is a workaround?
Use a CTAS statement to create a new table with the desired partition boundaries
What is the benefit of using the TRUNCATE_TARGET option in the ALTER TABLE command when loading data into partitions?
It avoids locking contention associated with traditional data loading methods
When splitting a partition that contains data, what is the recommended step after completing the data movement?
Refresh the statistics on the target table
What is a potential issue with using an ALTER TABLE statement to switch out existing data in a partition before loading new data?
It may lead to locking contention on busy systems
When splitting a partition that contains data in a non-columnstore table, which statement should be used?
ALTER PARTITION
What is the purpose of using a CTAS statement alongside deployment when continuously deploying partition changes on a table with data?
To temporarily move data out of each partition before applying the partition SPLIT RANGE
In the context of partition switching, what does it mean for partition boundaries to be aligned between two tables?
The partition ranges or values match between the tables
What is the primary advantage of using replicated tables in Azure SQL Data Warehouse?
Improved query performance by reducing data movement across compute nodes
For which type of tables are replicated tables particularly beneficial in Azure SQL Data Warehouse?
Dimension tables in a star schema
What is a potential drawback of using replicated tables in Azure SQL Data Warehouse?
Increased storage requirements due to data replication
Based on the information provided, which statement is true regarding the recommended usage of replicated tables?
Replicated tables should be considered for small dimension tables in a star schema
Which of the following statements best summarizes the purpose of replicated tables in Azure SQL Data Warehouse?
To improve query performance by reducing data movement across compute nodes
Explore the concept of table partitions in dedicated SQL pool, learn how to divide data into smaller groups based on specific criteria such as date columns. Discover recommendations and examples for effectively utilizing table partitions in various table types and distribution methods.
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