oracle11g - Write 2 SQL queries -


ex_complex exercise complex

here erd. use oracle sql. need:

1) select exercise involves greatest number of muscle.

2) select top 5 exercises number of involved muscles.

i've written queries: it's first task , second same, except r < 6:

select * exercise exercise.ex_id =     (select ex_id             (select e.ex_id, dense_rank() on (order count(*) desc) r         muscle m, muscle_group mg, ex_complex ex_c, exercise e         m.mgroup_id = mg.mgroup_id           , ex_c.mgroup_id = mg.mgroup_id           , ex_c.ex_id = e.ex_id         group e.ex_id)      r < 2);

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