What is the ScriptDom? The ScriptDom is an api for taking t-sql scripts, converting them into an AST or taking an AST and generating t-sql.

What is an AST? Read this: https://en.wikipedia.org/wiki/Abstract_syntax_tree

Think about this:

select col from tablea

select col from tablea

select col /*from not_table*/ from tablea

select –not_col

col from tablea

and then something more complicated like:

select col from (select a as col from something /*else*/) a