Problem
a) Describe the select statement.
b) Describe the select statement with group by with sum and count.
c) Describe the joining 2 tables with interjoin.
d) Describe the where statement.
e) Describe the having statement
f) Describe the insert statement.
g) What is foreign key?
h) What is a primary key?
i) What is an index?
j) What is a subquery?
k) What is the difference between mySQL and MongoDB?
l) What is the difference between access and Postgresql?