Simple "new variable" question (beginner)

[jcabrera]

Hello,

I'm trying to create a new "running" variable in my data set but I cant figure out how to do it with a simple code. This is my dataset:

Trial	Interval	Group	Response	New Variable
1	1	1	3	23	= 3 + 8 + 12
1	1	2	8	23	= 3 + 8 + 12
1	1	3	12	23	= 3 + 8 + 12
1	2	1	3	28	= 7 + 18 + 3
1	2	2	7	28	= 7 + 18 + 3
1	2	3	18	28	= 7 + 18 + 3
1	3	1	3	.	.
1	3	2	17	.	.
1	3	3	12	.	.
1	4	1	19
1	4	2	15
1	4	3	16
2	1	1	0
2	1	2	11
2	1	3	17
2	2	1	7
2	2	2	20
2	2	3	10
2	3	1	0

The "new variable" should be created by adding up the three response values across all 3 group members for each interval but I would like to keep the sum as a variable (as shown).

Any help would be greatly appreciated.

Thank you.

[LinusH]

Use SQL with group by on trial, interval and group, sum(response). If you want to keep the data on the detail level just keep response as seprate item in the select clause. SQL will automatically remerge back the sum on the detail rows.

[jcabrera · Accepted solution]

Thank you. Your advice really helped. I managed to create the variable.