Learn how to remove a column in Magento 2 DB with schema. Our Magento Support team is here to help you with your questions and concerns.

Magento 2 DB Schema Remove Column

Did you know that we can remove a column in Magento 2 with a declarative schema?

This schema has a specific process to ensure the changes are handled correctly if we upgrade or roll back our module.

Furthermore, declarative schema management lets us define database structure changes in a structured XML file and Magento takes care of the operations.

Let’s take a look at how to remove a column from a database table in Magento 2:

1. To begin with, we have to identify the table from which we want to remove the column.
2. Then, take a backup of the database.
3. After that, open the db_schema.xml file for our module if it doesn’t already exist. We can find this file in our module’s Setup directory.
4. Then, head to the <table> element for the table we want to modify and use the <column> element with the xsi:remove attribute to specify the column we want to remove.

   For example:

   



   Here, xsi:remove=”true” attribute tells Magento to remove this column when the module is upgraded.
5. Then, we have to create a database upgrade script. This script tells Magento to apply the changes we mentioned in db_schema.xml.
6. We can create a new file, like UpgradeSchema.php, in our module’s Setup directory and define the upgrade operation.

   For example:

   


7. Now, it is time to run the upgrade process with this command:

   php bin/magento setup:upgrade

   This command applies our upgrade script and executes the changes mentioned in our db_schema.xml file.

Let us know if you need further help removing a column from a database table in Magento 2 using declarative schema management.

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Conclusion

In brief, our Support Experts demonstrated how to remove a column in Magento 2 DB with schema.