SQL Sum over partition "NOT" by column - sql

Question

I need to build analytical SQL queries in which the client should specify any metrics(summing of values in a specific column) or dimensions (group by specific columns).
Assume that I have a table with columns hour, dim_a, dim_b, metric_a, metric_b, metric_c with values showed in csv below
hour,dim_a,dim_b,metric_a,metric_b
0,A,X,4,4
0,A,Y,4,24
0,B,Y,20,24
1,B,Y,21,35
1,A,Y,4,35
1,C,Y,10,35
2,B,Y,21,30
2,C,Y,3,30
2,A,Y,6,30
Take a look at metric_b. This metric is always the same if values hour and dim_b are the same regardless of value of dim_a. For example:
1,B,Y,21,35
1,A,Y,4,35
1,C,Y,10,35
If we select columns hour, dim_b, metric_b and take distinct values table will look like:
hour,dim_b,metric_b
0,X,4
0,Y,24
1,Y,35
2,Y,30
And by this values all aggregations against metric_b should be done
I would to like run analytical queries over this data grouping by specific dimensions and doing aggregations of metrics with special aggregation when it comes to metric_b.
when I want to group by hour, dim_a, dim_b, and see metrics metric_a and metric_b. Expected result is
hour,dim_a,dim_b,metric_a,metric_b
0,A,X,4,4
0,A,Y,4,24
0,B,Y,20,24
1,B,Y,21,35
1,A,Y,4,35
1,C,Y,10,35
2,B,Y,21,30
2,C,Y,3,30
2,A,Y,6,30
When I want to group by dim_a, dim_b, and see metrics metric_a and metric_b. Expected result is
dim_a,dim_b,metric_a,metric_b
A,X,4,4
A,Y,14,89
B,Y,62,89
C,Y,13,89
Value of metric_b is calculated from 89 = 24 + 35 + 30; 4 = 4
When I want to group by dim_b, and see metric. metric_a and metric_b. Expected result is:
dim_b,metric_a,metric_b
X,4,4
Y,89,89
Value of metric_b is calculated from 89 = 24 + 35 + 30; 4 = 4
And finally when I want to group by dim_a, and see metric. metric_a and metric_b. The expected result is:
dim_a,metric_a,metric_b
A,18,93
B,62,93
C,13,93
Value of metric_b is calculated from 93 = 24 + 35 + 30 + 4
So aggregation of metric_b should be a sum of metric_b but not taking in the accounts dim_a as a grouping column, but taking everything else. Is there SQL syntax that could help me doing this?
What's more I would like to say that these queries are going to be run on AWS Redshift and there are 20 metrics and dimension 16 so 36 columns. And there will be up to 100 billions of rows there.

Answer 1

for number 2:
SELECT *
FROM (
SELECT dim_a
,dim_b
,sum(metric_a) a
FROM dbo.Table_2 t
GROUP BY dim_a
,dim_b
) a
CROSS APPLY (
SELECT sum(metric_b) b
FROM (
SELECT DISTINCT metric_b
,hour
,dim_b
FROM dbo.Table_2
) t2
WHERE t2.dim_b = a.dim_b
) c
for number 3 :
SELECT *
FROM (
SELECT dim_b
,sum(metric_a) a
FROM dbo.Table_2 t
GROUP BY dim_b
) a
CROSS APPLY (
SELECT sum(metric_b) b
FROM (
SELECT DISTINCT metric_b
,hour
,dim_b
FROM dbo.Table_2
) t2
WHERE t2.dim_b = a.dim_b
) c
for number 4:
SELECT *
FROM (
SELECT dim_a
,sum(metric_a) a
FROM dbo.Table_2 t
GROUP BY dim_a
) a
CROSS APPLY (
SELECT sum(metric_b) b
FROM (
SELECT DISTINCT metric_b
,hour
,dim_b
FROM dbo.Table_2
) t2
) c