Table Partitioning in Dedicated SQL Pool

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What is the primary benefit of partitioning in dedicated SQL pool?

Improving data maintenance
Enhancing query performance
Reducing transaction logging
Increasing data loading efficiency (correct)

Which type of column is commonly used for creating table partitions in dedicated SQL pool?

Text column
Boolean column
Date column (correct)
Numeric column

In dedicated SQL pool, which types of tables support partitioning?

Only clustered columnstore tables
Only heap tables
All table types (correct)
Only clustered index tables

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 (D) Signup and view all the answers

Which distribution types support partitioning in dedicated SQL pool?

Both hash and round robin distributed (C) Signup and view all the answers

How can partition switching benefit data maintenance in dedicated SQL pool?

It enables quick removal or replacement of a section of a table (B) Signup and view all the answers

What is the primary benefit of partitioning a table in a dedicated SQL pool?

Reduced storage requirements by deleting old data partitions (C) Signup and view all the answers

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 (B) Signup and view all the answers

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 (A) Signup and view all the answers

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 <code>DROP PARTITION</code> statement (D) Signup and view all the answers

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 (C) Signup and view all the answers

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 (A) Signup and view all the answers

What is the recommended approach for assessing the quality of clustered columnstore indexes in partitioned tables?

Query the <code>sys.dm_db_column_store_row_group_operational_stats</code> dynamic management view (A) Signup and view all the answers

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 (B) Signup and view all the answers

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 (D) Signup and view all the answers

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 (A) Signup and view all the answers

What is the primary purpose of partition switching in dedicated SQL pools?

To load new data into partitions without locking contention (C) Signup and view all the answers

Which condition must be met for a successful partition switch between two tables?

The partition boundaries must be aligned between the tables (A) Signup and view all the answers

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 (D) Signup and view all the answers

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 (D) Signup and view all the answers

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 (C) Signup and view all the answers

When splitting a partition that contains data, what is the recommended step after completing the data movement?

Refresh the statistics on the target table (D) Signup and view all the answers

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 (A) Signup and view all the answers

When splitting a partition that contains data in a non-columnstore table, which statement should be used?

ALTER PARTITION (D) Signup and view all the answers

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 (A) Signup and view all the answers

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 (C) Signup and view all the answers

What is the primary advantage of using replicated tables in Azure SQL Data Warehouse?

Improved query performance by reducing data movement across compute nodes (C) Signup and view all the answers

For which type of tables are replicated tables particularly beneficial in Azure SQL Data Warehouse?

Dimension tables in a star schema (C) Signup and view all the answers

What is a potential drawback of using replicated tables in Azure SQL Data Warehouse?

Increased storage requirements due to data replication (C) Signup and view all the answers

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 (D) Signup and view all the answers

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 (A) Signup and view all the answers