How to Diagnose and Fix the ORA-01505 Duplicate PCTUSED Option Specification Error in Oracle

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If you encounter the ORA-01505 error in Oracle, it means that you have specified the PCTUSED storage parameter more than once for a table or cluster. This can happen when creating or altering a table or cluster, and it indicates a conflict in the storage parameters.

To diagnose and fix the ORA-01505 error, you can follow these steps:

1. Diagnosing the Error:
– Check the SQL statement that caused the error. Look for any duplicate specifications of the PCTUSED storage parameter.
– Use the following query to find the table or cluster that is causing the error:

SELECT table_name
FROM all_tables
WHERE pctused IS NOT NULL;

2. Fixing the Error:
– Remove the duplicate PCTUSED specification from the SQL statement that caused the error.
– If you are altering a table, make sure to specify the storage parameters correctly without any duplicates.
– If you are creating a new table, ensure that the storage parameters are specified only once.

Example 1: Diagnosing the Error
Suppose you have the following SQL statement that caused the ORA-01505 error:

CREATE TABLE employees (
employee_id NUMBER,
employee_name VARCHAR2(100))
PCTUSED 40
PCTUSED 50;

In this case, the error is caused by the duplicate specification of the PCTUSED parameter.

Example 2: Fixing the Error
To fix the error, you can remove the duplicate PCTUSED specification from the SQL statement:

CREATE TABLE employees (
employee_id NUMBER,
employee_name VARCHAR2(100))
PCTUSED 40;

By removing the duplicate PCTUSED specification, you can resolve the ORA-01505 error.

In conclusion, the ORA-01505 error in Oracle indicates a duplicate specification of the PCTUSED storage parameter for a table or cluster. By diagnosing the error and ensuring that the storage parameters are specified correctly without any duplicates, you can fix the issue and successfully create or alter the table or cluster.

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