Regular Expressions - Basic, UNIX, XML, and SQL

instructor's question for class discussion:

What is the importance of regular expressions in data analytics? Also, discuss the differences between the types of regular expressions. Choose two types of regular expressions and discuss the differences between the two. Please be sure to include two or three differences for each. Include how they help manipulate data.

Also, Reply to your classmates:

When replying to your classmate's posts, offer your opinion on what he/she thinks is the importance of regular expressions, whether you agree or disagree, and why.