Explain at least ten advanced SQL features that you think would be the most useful to an SQL programmer. Suppose you have been hired by a company since you are an SQL expert. The company’s employees have gone through a beginner’s SQL course. They want you to teach a more advanced class on SQL. To do so, you are creating this project which will highlight at least ten features of SQL that you feel these programmers need to know. For each feature, do the following: 1) Explain the feature thoroughly. 2) Explain why this feature is important to know and how it will benefit the programmer and the company.