PREFACE: Hi, I’m studying SQL, I haven’t been taught about partitioning with this feature, so I’d like to understand how to solve this problem using ‘basic’ SQL statements.
My relation is like this:
Table (employee, day, worked_hours)
I have to get the 5 days each employee worked longer, this for each employee (each day may have more than 1 record per employee)
the solution I found (but that won’t be accepted at the exam) is this:
SELECT t.employee, t.day, t.w_hour FROM ( SELECT employee, day, w_hour ROW_NUMBER() OVER (PARTITION BY employee ORDER BY w_hour DESC, day DESC) AS rn FROM table ) AS t WHERE T.rn <=5
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