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Here is the code I use in a Ruby on Rails project to find residences which have amenities with the … Read more Get The Count Of Rows Count After Group By

I'm trying to manually execute SQL commands so I can access procedures in NuoDB. I'm using … Read more How Do You Manually Execute Sql Commands In Ruby On Rails Using Nuodb

What are the pros and cons of breaking out optional 1:1 attributes into their own separate model. F… Read more Rails Activerecord And Db Normalization

I have a few massive SQL request involving join across various models in my rails application. A si… Read more How To Join On Subqueries Using Arel?

The model Price has an attribute data, so Price.pluck(:data) results in something like [3.99,4.55,… Read more Pluck Last Value Of An Association In Rails

I have an ActiveRecord schema, PurchaseSummary, that I inherited and THAT I CAN NOT CHANGE that loo… Read more Difficulty With Activerecord Query That Does Percentage Calculation

I'm running into problems using macruby with ActiveRecord (w/ sqlite3) or Sequel. Any other sug… Read more Simple Persistence Framework Compatible With Macruby?

I am using eager loading to join two of my tables Model1.eager_load(:model2) The Model1 table has … Read more Rails Activerecord Eager Load Takes A Long Time

So I've got the follow model in activerecord, I will use Discussion.user_replied_group_discussi… Read more Sql Query Order Problem

I'm using jOOQ v2.6 as I'm using SQL Server 2008 R2 and there is a bug in jOOQ v3.1 which c… Read more Overriding Jooq's Exception Handling For Updatablerecords

In continuation of Find entry where value does not intersect with other value I have an application… Read more Implementation Of Blocked Dates For A User-event Orm Model

I have a Rails app using sqlite3. Anytime I want to save anything in test environment I'm getti… Read more Rails/activerecord/sqlite3: Can't Save Records In Test Environment

I need help with SELECT FROM nested SELECT. How can I rewrite following query in an ActiveRecord wa… Read more Activerecord Nested Select

I have a table 'my_table'. It has the following data : ID --- Date 1 --- 0… Read more Sql Query To Return Nil For Dates Not Present In The Table

I have a table like this, and I want to return the top two person (by name) with the highest salary… Read more Rails. Select Records With Max()

How can I create active relation queries in Rails 3 that are aggregated by time slice? I'd li… Read more How To Get Aggregate Data By Time Slice (sum, Avg, Min, Max, Etc.) In Rails 3

I have two models in my rails application. Items and Reviews. Reviews belong to Item and Items has … Read more Activerecord Syntax For Finding All Items With An Average Rating Of X Or Greater When Using A Join

I have the following model relationships: class Article :article_tags end class ArticleTag Solutio… Read more Rails3 Activerecord - Fetching All Records That Have A And B (through A Has_many Relationship)

I'am trying to build an eshop with multicategory support for products, so whenever I select a s… Read more How To Join Two Columns With One Serialized Data?

I have models class Offer Solution 1: The only thing you've added is a where -clause. Seems li… Read more Rails Pg::undefinedtable: Error: Missing From-clause Entry For Table