Deleting data directly from the database using a tool like pgAdmin or dBeaver can be dangerous if you are not careful. It is not recommended to delete data directly from the database unless you are very familiar with the database structure and you have a backup of the database.

Before deleting any data from the database, it is important to understand the consequences of deleting that data. Deleting BOM entries can have a significant impact on your inventory management and production planning. If you delete BOM entries, you may need to recreate them manually, which can be a time-consuming process.

If you decide to delete BOM entries, it is recommended to use the Odoo application's built-in functionality to do so. The safest way to delete BOM entries is to use the "Delete" button in the BOM form view in Odoo. This will ensure that all related data is also deleted, including the BOM lines.

If you still want to delete BOM entries directly from the database, you can do so by executing a SQL command. The exact SQL command to delete all BOM table entries in Odoo depends on the version of Odoo you are using and the database backend you are using (e.g., PostgreSQL, MySQL, etc.). It is important to be very careful when executing SQL commands, as they can have unintended consequences. I would recommend consulting with a database administrator or a knowledgeable Odoo developer before proceeding.

In summary, it is not recommended to delete data directly from the database unless you are very familiar with the database structure and you have a backup of the database. If you decide to delete BOM entries, it is recommended to use the "Delete" button in the BOM form view in Odoo. If you still want to delete BOM entries directly from the database, it is recommended to consult with a database administrator or a knowledgeable Odoo developer before proceeding.