SQL Server — DDL & constraints

1 MySQL SELECT with LIMIT Easy 2 T-SQL IDENTITY & FK #1 Hard 3 T-SQL IDENTITY & FK #2 Medium 4 T-SQL IDENTITY & FK #3 Easy 5 T-SQL IDENTITY & FK #4 Medium 6 T-SQL IDENTITY & FK #5 Hard 7 T-SQL IDENTITY & FK #6 Medium 8 T-SQL IDENTITY & FK #7 Easy 9 T-SQL IDENTITY & FK #8 Medium 10 T-SQL IDENTITY & FK #9 Hard 11 T-SQL IDENTITY & FK #10 Medium 12 T-SQL IDENTITY & FK #11 Easy 13 T-SQL IDENTITY & FK #12 Medium 14 T-SQL IDENTITY & FK #13 Hard 15 T-SQL IDENTITY & FK #14 Medium 16 T-SQL IDENTITY & FK #15 Easy 17 T-SQL IDENTITY & FK #16 Medium 18 T-SQL IDENTITY & FK #17 Hard 19 T-SQL IDENTITY & FK #18 Medium 20 T-SQL IDENTITY & FK #19 Easy 21 T-SQL IDENTITY & FK #20 Medium 22 T-SQL IDENTITY & FK #21 Hard 23 T-SQL IDENTITY & FK #22 Medium 24 T-SQL IDENTITY & FK #23 Easy 25 T-SQL IDENTITY & FK #24 Medium 26 T-SQL IDENTITY & FK #25 Hard 27 T-SQL IDENTITY & FK #26 Medium 28 T-SQL IDENTITY & FK #27 Easy 29 T-SQL IDENTITY & FK #28 Medium 30 T-SQL IDENTITY & FK #29 Hard 31 T-SQL IDENTITY & FK #30 Medium 32 T-SQL IDENTITY & FK #31 Easy 33 T-SQL IDENTITY & FK #32 Medium 34 T-SQL IDENTITY & FK #33 Hard 35 T-SQL IDENTITY & FK #34 Medium 36 T-SQL IDENTITY & FK #35 Easy 37 T-SQL IDENTITY & FK #36 Medium 38 T-SQL IDENTITY & FK #37 Hard 39 T-SQL IDENTITY & FK #38 Medium 40 T-SQL IDENTITY & FK #39 Easy 41 T-SQL IDENTITY & FK #40 Medium 42 T-SQL IDENTITY & FK #41 Hard 43 T-SQL IDENTITY & FK #42 Medium 44 T-SQL IDENTITY & FK #43 Easy 45 T-SQL IDENTITY & FK #44 Medium 46 T-SQL IDENTITY & FK #45 Hard 47 T-SQL IDENTITY & FK #46 Medium 48 T-SQL IDENTITY & FK #47 Easy 49 T-SQL IDENTITY & FK #48 Medium 50 T-SQL IDENTITY & FK #49 Hard