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Asked by amai in PostgreSQL Database
Hi,
i have this set of data
Name Age ExerciseType Score
PersonA 30 Pushup 30
PersonA 30 Situp 32
PersonB 30 Pushup 44
PersonB 30 Situp 25
PersonC 40 Pushup 39
PersonC 40 Situp 43
PersonD 40 Pushup 25
PersonD 40 Situp 30
In the end result, I would like to get the highest score for each ExercisType for their age category. Example
PersonA 30 Situp 32
PersonB 30 Pushup 44
PersonC 40 Situp 43
PersonC 40 Pushup 39
I realised when I do max, I cannot put in person's identity as part of the Group By, as it will mess up the group. Currently I'm joining at least 3 sub-select to get what I need, but I'm wondering if there are a more effective way to do so.
Can someone help? Thanks!
20091111-EE-VQP-89 / EE_QW_1_20070628