João Daniel

Belo Horizonte, Brazil

linkedin.com/in/jdanielnd

Age: 25

I'm a BA statistic's student at UFMG (Brasil), and co-founder at Tecto - a startup in the data analysis field. I've experience in programming (C, Java, HTML, CSS, Ruby, RoR) and data analysis.

Jul
28
awarded Favorite Question
Jul
21
awarded Curious
Jul
16
awarded Notable Question
Jul
14
awarded Nice Answer
Jul
10
awarded Student
Jul
10
awarded Autobiographer
Jul
10
asked Is it a bad practice to keep Master and Slave (Replica) Database on Same Server?
Jul
2
awarded Notable Question
Jun
10
awarded Nice Question
Jun
7
accepted Data modeling in multiple aggregation levels
Jun
3
comment Negative comparison with ActiveRecord
I'm concerned about unique combinations of those two attributes. Not for every repetition it can have with different product_id's or values.
Jun
3
comment Negative comparison with ActiveRecord
I'm using PostgreSQL
Jun
3
asked Negative comparison with ActiveRecord
Jun
2
asked Data modeling in multiple aggregation levels
May
21
comment Same query on Rails and SQL return different results
I believe it's related to the fact that both group by columns have the same name..
May
21
comment Same query on Rails and SQL return different results
Both queries with or withour the OUTER produces the desired output on DB console. It seems the problem is how AR is transforming it on a hash.
May
21
comment Same query on Rails and SQL return different results
Here is an example of the working query: sqlfiddle.com/#!9/7a6d1/1/0. The same doesn't work on Rails..
May
21
asked Same query on Rails and SQL return different results
May
6
accepted Avoid text to change in disagreement with collapse
May
6
comment Avoid text to change in disagreement with collapse
Thanks Henrik! Didn't noticed that section in the docs. It did solved my problem! :)
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