What is SQL?
SQL stands for Structured Query Language SQL lets you access and manipulate databases SQL is an ANSI (American National Standards Institute) standard
In most cases, the value of this is determined by how a function is called. It can't be set by assignment during execution, and it may be different each time the function is called. ES5 introduced the bind method to set the value of a function's this regardless of how it's called, and ES2015 introduced arrow functions which don't provide their own this binding (it retains this value of the enclosing lexical context).
What is data structures?
In computer science, a data structure is a particular way of organizing and storing data in a computer so that it can be accessed and modified efficiently.