MySQL — DDL & constraints

1 MySQL SELECT with LIMIT Easy 2 MySQL CREATE TABLE with AUTO_INCREMENT #1 Hard 3 MySQL CREATE TABLE with AUTO_INCREMENT #2 Medium 4 MySQL CREATE TABLE with AUTO_INCREMENT #3 Medium 5 MySQL CREATE TABLE with AUTO_INCREMENT #4 Hard 6 MySQL CREATE TABLE with AUTO_INCREMENT #5 Medium 7 MySQL CREATE TABLE with AUTO_INCREMENT #6 Medium 8 MySQL CREATE TABLE with AUTO_INCREMENT #7 Hard 9 MySQL CREATE TABLE with AUTO_INCREMENT #8 Medium 10 MySQL CREATE TABLE with AUTO_INCREMENT #9 Medium 11 MySQL CREATE TABLE with AUTO_INCREMENT #10 Hard 12 MySQL CREATE TABLE with AUTO_INCREMENT #11 Medium 13 MySQL CREATE TABLE with AUTO_INCREMENT #12 Medium 14 MySQL CREATE TABLE with AUTO_INCREMENT #13 Hard 15 MySQL CREATE TABLE with AUTO_INCREMENT #14 Medium 16 MySQL CREATE TABLE with AUTO_INCREMENT #15 Medium 17 MySQL CREATE TABLE with AUTO_INCREMENT #16 Hard 18 MySQL CREATE TABLE with AUTO_INCREMENT #17 Medium 19 MySQL CREATE TABLE with AUTO_INCREMENT #18 Medium 20 MySQL CREATE TABLE with AUTO_INCREMENT #19 Hard 21 MySQL CREATE TABLE with AUTO_INCREMENT #20 Medium 22 MySQL CREATE TABLE with AUTO_INCREMENT #21 Medium 23 MySQL CREATE TABLE with AUTO_INCREMENT #22 Hard 24 MySQL CREATE TABLE with AUTO_INCREMENT #23 Medium 25 MySQL CREATE TABLE with AUTO_INCREMENT #24 Medium 26 MySQL CREATE TABLE with AUTO_INCREMENT #25 Hard 27 MySQL CREATE TABLE with AUTO_INCREMENT #26 Medium 28 MySQL CREATE TABLE with AUTO_INCREMENT #27 Medium 29 MySQL CREATE TABLE with AUTO_INCREMENT #28 Hard 30 MySQL CREATE TABLE with AUTO_INCREMENT #29 Medium 31 MySQL CREATE TABLE with AUTO_INCREMENT #30 Medium