View Detailed Information on Sales Table Partitions
Checking Partitioned Table Information
Write a PostgreSQL query to display partition details for the Sales table.
Solution:
-- Get details of partitions in the Sales table.
-- Select partition name and parent table using type conversion to regclass for readability.
SELECT inhrelid::regclass AS partition_name, inhparent::regclass AS parent_table
-- Retrieve the information from the system catalog table that stores inheritance details.
FROM pg_inherits
-- Filter to include only partitions where the parent table is Sales.
WHERE inhparent = 'Sales'::regclass;
Explanation:
- Purpose of the Query:
- Retrieves information about existing partitions.
- Key Components:
- Queries pg_inherits, the system catalog table for partitions.
- Real-World Application:
- Useful for verifying partitioning structure in large databases.
Notes:
- Run this query before performing partition management tasks.
For more Practice: Solve these Related Problems:
- Write a PostgreSQL query to list all partitions of a given table along with their row counts.
- Write a PostgreSQL query to display each partition’s boundaries and partitioning key values.
- Write a PostgreSQL query to retrieve the storage size for each partition in a partitioned table.
- Write a PostgreSQL query to check the last modification timestamp for each partition of a table.
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Previous PostgreSQL Exercise: Creating an Index on a Partitioned Table.
Next PostgreSQL Exercise: Inserting Data into a Partitioned Table.What is the difficulty level of this exercise?
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