You can connect to different SQL databases using the sql-* functions. Also, there's a sql-mode for editing SQL queries.

Litman plates are a way to get color photography from silver plates. A piece of glass is coated with some silver solution and placed inside a mercury bath. As light reflects off the mercury the wavelength creates tiny mirrors inside of silver structure. When viewed at a certain angle this creates the color effect.

In Vim (and Emac's Evil Mode) we can use visual line and press lowercase u to make text lowercase and uppercase U to make it uppercase.