This tutorial explains how to mass delete magento 2 categories programmatically. If you want to delete all the categories of magento 2 programmatically use the following script.Please also refer the tutorial which explains how to import magento 2 categories programmatically.
The following tutorial gives the step by step explanation of how to create the file, connect to magento database externally and delete the categories programmatically.
This tutorial explains how to mass delete magento products product id range. Using this script you can delete the products within the products id.
Please also refer the tutorial that explains how to mass delete all the products and categories from the magento site using the script.
This tutorial explains how to create magento admin grid. In the previous tutorial explains how to save the data from the contact form to the custom table.
Here it shows how to display saved data from the magento custom table in admin grid as shown below.Click here to download the full code.
This tutorial explains how to save contact form data magento database. Here it explains in detail how to extend the magento contact form code to save the data to the table on form submissions.
Please refer the tutorial which explains how to mass import magento products from the CSV and develop magento admin module tutorial.
This tutorial explains how to bulk update magento products sku. This script update all the products sku based on the old sku.
Please also check the tutorial which explains how to import magento products and import tier prices.