Query Entire Sales Data Across All Partitions

Retrieve All Data from a Partitioned Table

Write a PostgreSQL query to fetch all records from a partitioned Sales table

Solution:

-- Retrieve all records from the Sales table.
SELECT * FROM Sales;

Explanation:

• Purpose of the Query:
• Fetches all rows stored across multiple partitions of the Sales table.
• Key Components:
• SELECT * FROM Sales: Retrieves data from the parent table, which includes all partitions.
• Real-World Application:
• Ensures partitioned data can be queried as a single dataset.

Notes:

• The PostgreSQL optimizer will scan only relevant partitions for performance optimization.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to retrieve all records from a partitioned table and include an additional filter on a non-partition key column.
• Write a PostgreSQL query to fetch all data from a partitioned table while ordering the results by a timestamp column.
• Write a PostgreSQL query to retrieve all records from a partitioned table and join the results with another table based on a common key.
• Write a PostgreSQL query to fetch all data from a partitioned table using a subquery that restricts the result set.

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