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how to calculculate cumalative frequency in my sql

yog gaikwad
Greenhorn

Joined: Nov 15, 2011
Posts: 11
Marks Frequency Cumulative total Cumulative frequency rank
11-20 2 2 2
21-30 11 2+11 13 5
31-40 19 13+19 32
41-50 36 32+36 68 1
51-60 42 68+42 110
61-70 31 110+31 141
71-80 13 141+13 154 2
81-90 6 154+6 160

i want this type of result in my databaseand i have no of student and test so how can i do?
please reply i am waiting
 
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subject: how to calculculate cumalative frequency in my sql