Hi  Folks:
I appreciate for your help  to guide me to solve this problem.
I have a huge data set, in which i have school districts listed, and within each school district are diffierent number of schools listed, and there are 2 numerical variables by school , but i want the sum of each variable for by school district. Since it is a very large data set with thousands of school districts, it is  tedious to do the work by spreadsheet.  Can someone help me to show how to output the sum for each school district. 
Here is the small sample data :
 
code             schldistric        school    lunch      student 
1600001         a                        ab       2              4
1600001         a                        cd       3              7
1600001         a                         er       5           12
1600060         c                        cd        3            21
1600060         c                         w        2             3
1400003          e                        gh       3             230
3000023          v                         kl        2            3
3000023          v                         gr        3            2
3000023          v                          rt       4             12
 
what i want is the output  as follow
 
code             schldistric        lunch_sum      student_sum 
1600001         a                        10                        23
1600060         c                          5                        24
1400003          e                         3                        230
3000023          v                         9                        17