Convert an Existing Table into an Orders Partition

Attaching an Existing Table as a Partition

Write a PostgreSQL query to attach an existing table as a new partition to the Orders table.

Solution:

-- Attach the existing table Orders_East as a partition of the Orders table
ALTER TABLE Orders ATTACH PARTITION Orders_East
-- Specify that this partition will contain rows with region 'East'
FOR VALUES IN ('East');

Explanation:

• Purpose of the Query:
• Converts a regular table into a partition of an existing partitioned table.
• Key Components:
• ALTER TABLE Orders ATTACH PARTITION: Attaches a partition dynamically.
• Real-World Application:
• Helps migrate existing data into a partitioned structure without data loss.

Notes:

• The table structure must match the partitioned table.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to attach an existing table as a partition after altering its structure to match the parent.
• Write a PostgreSQL query to attach an existing table as a partition using a non-standard partitioning key.
• Write a PostgreSQL query to attach an existing table as a partition while enforcing additional constraints on the data.
• Write a PostgreSQL query to attach an existing table as a partition and verify data integrity before the operation.

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Previous PostgreSQL Exercise: Removing a Partition from a Partitioned Table.