Describe the six clauses in the syntax of an sql retrieval query. show what type of constructs can be specified in each of the six clauses. which of the six clauses are required and which are optional?

How is a wan different than a lan? both connect computers, but only wan users don’t need the same operating system. both are peer-to-peer networks, but only a wan requires networking hardware. both network computers, but only a wan can cover larger geographical ranges. both connect computers to the internet, but only wan connects to the cloud.