Extract Sales Data from the 2024 Partition

Query Data from a Specific Partition

Write a PostgreSQL query to fetch all sales records from the Sales_2024 partition.

Solution:

-- Retrieve all records from the Sales_2024 partition.
SELECT * FROM Sales_2024;

Explanation:

• Purpose of the Query:
• Fetches records from a specific partition rather than scanning all partitions.
• Key Components:
• Directly selecting from Sales_2024, which is a child partition.
• Real-World Application:
• Useful for analyzing a specific time period or region in partitioned data.

Notes:

• Bypasses the query planner’s partition pruning mechanism.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to retrieve data exclusively from a named partition and apply a filter on its columns.
• Write a PostgreSQL query to fetch data from a specific partition by dynamically constructing the partition name.
• Write a PostgreSQL query to count the records from a specified partition without scanning the parent table.
• Write a PostgreSQL query to retrieve data from a specific partition and sort the results by a designated column.

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Previous PostgreSQL Exercise: Retrieve All Data from a Partitioned Table.