how to use sum, multiply, divide and group by aggregation in single mongodb query
I have following mysql query in which I have done sum on two different fields called "count" and "population" and then divided sum(count)/sum(population) and then multiplied it with 100000 and finally grouping it by year.
Select year, cname, (sum(count)/sum(population))*100000 as total from cancer c where c.cname ="lung and bronchus" group by year;
I have written following query in mongodb but I am not sure how to project cname and year.
db.cancer_stats.aggregate([
{$match:{cname: "lung and bronchus"}},
{$group:{_id:"year"},
{total:{$multiply:[$divide:[$sum:"$count", $sum:"population"], 100000]}}
}])
can anyone guide me in solving this query?
mysql mongodb
asked Dec 8 '14 at 6:57
YashYash
86213
add a comment |
I have following mysql query in which I have done sum on two different fields called "count" and "population" and then divided sum(count)/sum(population) and then multiplied it with 100000 and finally grouping it by year.
Select year, cname, (sum(count)/sum(population))*100000 as total from cancer c where c.cname ="lung and bronchus" group by year;
I have written following query in mongodb but I am not sure how to project cname and year.
db.cancer_stats.aggregate([
{$match:{cname: "lung and bronchus"}},
{$group:{_id:"year"},
{total:{$multiply:[$divide:[$sum:"$count", $sum:"population"], 100000]}}
}])
can anyone guide me in solving this query?
mysql mongodb
asked Dec 8 '14 at 6:57
YashYash
86213
add a comment |
I have following mysql query in which I have done sum on two different fields called "count" and "population" and then divided sum(count)/sum(population) and then multiplied it with 100000 and finally grouping it by year.
Select year, cname, (sum(count)/sum(population))*100000 as total from cancer c where c.cname ="lung and bronchus" group by year;
I have written following query in mongodb but I am not sure how to project cname and year.
db.cancer_stats.aggregate([
{$match:{cname: "lung and bronchus"}},
{$group:{_id:"year"},
{total:{$multiply:[$divide:[$sum:"$count", $sum:"population"], 100000]}}
}])
can anyone guide me in solving this query?
mysql mongodb
asked Dec 8 '14 at 6:57
YashYash
86213
I have following mysql query in which I have done sum on two different fields called "count" and "population" and then divided sum(count)/sum(population) and then multiplied it with 100000 and finally grouping it by year.
Select year, cname, (sum(count)/sum(population))*100000 as total from cancer c where c.cname ="lung and bronchus" group by year;
I have written following query in mongodb but I am not sure how to project cname and year.
db.cancer_stats.aggregate([
{$match:{cname: "lung and bronchus"}},
{$group:{_id:"year"},
{total:{$multiply:[$divide:[$sum:"$count", $sum:"population"], 100000]}}
}])
can anyone guide me in solving this query?
mysql mongodb
mysql mongodb
asked Dec 8 '14 at 6:57
YashYash
86213
asked Dec 8 '14 at 6:57
YashYash
86213
asked Dec 8 '14 at 6:57
YashYash
86213
asked Dec 8 '14 at 6:57
YashYash
86213
asked Dec 8 '14 at 6:57
YashYash
86213
86213
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
I'm not sure what you mean by "solving the query", but that query is not valid in its current form. I think you want a pipeline like the following:
db.cancer_stats.aggregate([
{ "$match" : { "cname" : "lung and bronchus" } },
{ "$group" : { "_id" : "year", "t_count" : { "$sum" : "$count" }, "t_population" : { "$sum" : "$population" } } },
{ "$project" : { "result" : { "$multiply" : [100000, { "$divide" : ["$t_count", "$t_population"] } ] } } }
])
Does that answer your question?
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
Thank you for your answer; it is getting executed but not showing any result. it is displaying {"result":, "ok":1}
– Yash
Dec 8 '14 at 20:32
what does this mean?
– Yash
Dec 8 '14 at 20:38
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I'm not sure what you mean by "solving the query", but that query is not valid in its current form. I think you want a pipeline like the following:
db.cancer_stats.aggregate([
{ "$match" : { "cname" : "lung and bronchus" } },
{ "$group" : { "_id" : "year", "t_count" : { "$sum" : "$count" }, "t_population" : { "$sum" : "$population" } } },
{ "$project" : { "result" : { "$multiply" : [100000, { "$divide" : ["$t_count", "$t_population"] } ] } } }
])
Does that answer your question?
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
Thank you for your answer; it is getting executed but not showing any result. it is displaying {"result":, "ok":1}
– Yash
Dec 8 '14 at 20:32
what does this mean?
– Yash
Dec 8 '14 at 20:38
add a comment |
I'm not sure what you mean by "solving the query", but that query is not valid in its current form. I think you want a pipeline like the following:
db.cancer_stats.aggregate([
{ "$match" : { "cname" : "lung and bronchus" } },
{ "$group" : { "_id" : "year", "t_count" : { "$sum" : "$count" }, "t_population" : { "$sum" : "$population" } } },
{ "$project" : { "result" : { "$multiply" : [100000, { "$divide" : ["$t_count", "$t_population"] } ] } } }
])
Does that answer your question?
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
Thank you for your answer; it is getting executed but not showing any result. it is displaying {"result":, "ok":1}
– Yash
Dec 8 '14 at 20:32
what does this mean?
– Yash
Dec 8 '14 at 20:38
add a comment |
I'm not sure what you mean by "solving the query", but that query is not valid in its current form. I think you want a pipeline like the following:
db.cancer_stats.aggregate([
{ "$match" : { "cname" : "lung and bronchus" } },
{ "$group" : { "_id" : "year", "t_count" : { "$sum" : "$count" }, "t_population" : { "$sum" : "$population" } } },
{ "$project" : { "result" : { "$multiply" : [100000, { "$divide" : ["$t_count", "$t_population"] } ] } } }
])
Does that answer your question?
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
I'm not sure what you mean by "solving the query", but that query is not valid in its current form. I think you want a pipeline like the following:
db.cancer_stats.aggregate([
{ "$match" : { "cname" : "lung and bronchus" } },
{ "$group" : { "_id" : "year", "t_count" : { "$sum" : "$count" }, "t_population" : { "$sum" : "$population" } } },
{ "$project" : { "result" : { "$multiply" : [100000, { "$divide" : ["$t_count", "$t_population"] } ] } } }
])
Does that answer your question?
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
answered Dec 8 '14 at 18:45
wdberkeleywdberkeley
9,26611215
9,26611215
Thank you for your answer; it is getting executed but not showing any result. it is displaying {"result":, "ok":1}
– Yash
Dec 8 '14 at 20:32
what does this mean?
– Yash
Dec 8 '14 at 20:38
add a comment |
Thank you for your answer; it is getting executed but not showing any result. it is displaying {"result":, "ok":1}
– Yash
Dec 8 '14 at 20:32
what does this mean?
– Yash
Dec 8 '14 at 20:38
Thank you for your answer; it is getting executed but not showing any result. it is displaying {"result":, "ok":1}
– Yash
Dec 8 '14 at 20:32
Thank you for your answer; it is getting executed but not showing any result. it is displaying {"result":, "ok":1}
– Yash
Dec 8 '14 at 20:32
what does this mean?
– Yash
Dec 8 '14 at 20:38
what does this mean?
– Yash
Dec 8 '14 at 20:38
add a comment |
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