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There could be several reasons why an Oracle batch command fails in code but works in SQL Developer. Some possible reasons include:

1. Syntax errors: The batch command may have syntax errors, such as missing or incorrect operators, quotes, or semicolons, that make it fail in code but not in SQL Developer. Check the syntax of the command and make sure it is correct.

2. Permissions: The user account used in code may not have the necessary permissions to execute the batch command, while the user account used in SQL Developer does. Check the permissions of the user account and make sure it has the correct privileges.

3. Connection issues: There may be issues with the database connection used in code that prevent the batch command from executing properly. Check the connection settings and make sure they are correct.

4. Environment differences: There may be differences in the environment between code and SQL Developer that affect the execution of the batch command. For example, the code may be running on a different operating system or using a different version of Oracle. Check for any environment differences and make sure they are accounted for.

5. Data differences: There may be differences in the data that cause the batch command to fail in code but not in SQL Developer. Check the data being used in both cases and make sure it is consistent.