SQL — Indexes & performance

1 Select all employees Easy 2 Select specific columns Easy 3 CREATE INDEX #1 Hard 4 CREATE INDEX #2 Medium 5 CREATE INDEX #3 Medium 6 CREATE INDEX #4 Hard 7 CREATE INDEX #5 Medium 8 CREATE INDEX #6 Medium 9 CREATE INDEX #7 Hard 10 CREATE INDEX #8 Medium 11 CREATE INDEX #9 Medium 12 CREATE INDEX #10 Hard 13 CREATE INDEX #11 Medium 14 CREATE INDEX #12 Medium 15 CREATE INDEX #13 Hard 16 CREATE INDEX #14 Medium 17 CREATE INDEX #15 Medium 18 CREATE INDEX #16 Hard 19 CREATE INDEX #17 Medium 20 CREATE INDEX #18 Medium 21 CREATE INDEX #19 Hard 22 CREATE INDEX #20 Medium 23 CREATE INDEX #21 Medium 24 CREATE INDEX #22 Hard 25 CREATE INDEX #23 Medium 26 CREATE INDEX #24 Medium 27 CREATE INDEX #25 Hard 28 CREATE INDEX #26 Medium 29 CREATE INDEX #27 Medium 30 CREATE INDEX #28 Hard 31 CREATE INDEX #29 Medium 32 CREATE INDEX #30 Medium