Database Administration Questions

Count function in SQL returns the number of values or rows.

Joseph F. Glidden - Father of Barbed Wire.

• Glidden was born in New York in 1812. He invented Barbed Wire in 1873 and was granted the patent on Nov. 24, 1874. After a three year battle over the patent, which he eventually won received a patent for the modern invention in 1874 after he made his own modifications to previous versions.

A Badminton shuttle or a tennis ball.

The Doppler effect or Doppler shift is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. 

The distance around a shape or figure I called Perimeter. A perimeter is a path that surrounds a two-dimensional shape.

Peru is a country in South America. Lima is the capital city of Peru. Sol is the currency of Peru.

In SQL, BETWEEN Keyword is used for ranges like Number Ranges, Date Ranges, etc...

HTML language is a set of markup tags. The code used to specify the formatting are called tags. Markup languages are designed for the processing, definition and presentation of text. The language specifies code for formatting, both the layout and style, within a text file. 

HTML is an example of a markup language to improve the appearance of, and link text with data on the internet.