Tag: virtual column

Virtual Column

The concept of views and function-based indexes has been known for many years. One of the brand new solutions is a virtual column – a feature introduced in Oracle 11g. Apart from database giant, some well known DB vendors, like MariaDB and SQL Server, support the idea of computed columns. So let’s give virtual columns a try and examine their basic usage.Generally, there are two kinds of virtual columns:Virtualvirtual columnPersistentvirtual column