New posts in Setup Script

Magento2 What's the point of having both InstallSchema and UpgradeSchema

Magento2: Setup Script not loaded

Magento 2: Create customer group programatically

Magento 2 Add "VARCHAR" type field into custom table

Magento2 : How to database schema upgrade

How can I add customer attribute in Magento 2?

Use of $installer v $this in install scripts