What is MD?
A Markdown table is the one people actually write by hand: pipes between the cells, a row of dashes under the header. GitHub, docs sites and half the world's READMEs render them, and their one real subtlety is that a pipe inside a code span is text, not a column break.
What is SQL?
A table as SQL is a CREATE TABLE and a run of INSERT statements: the form data takes when it is going into a database rather than a spreadsheet. Dialects differ on quoting, so this is written to the ANSI standard and says so in the file's first line.