Using QGIS, how to save an attribute table as sqlite?

How do I dock an attribute table in QGIS?

There’s a “Dock Attribute Table” button on the extreme right of the attribute table toolbar. Clicking it will dock/undock the attribute table.
 

What is SQLite in QGIS?

Both are available cross-platform, just like QGIS. SpatiaLite is the spatial extension for SQLite databases. SQLite is a self-contained, server-less, zero-configuration, and transactional SQL database engine (www.sqlite.org).

How to create a spatial database in QGIS?

Spatial Database: Connect to PostgreSQL/PostGIS Through QGIS

1. Open QGIS, select Layer -> Add layer -> Add PostGIS layers, it should open the interface to connect a PostGIS table.
2. In the dialogue, click “New”, it should open the dialogue to configure the PostGIS server, and database (nyc1).