self-join

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Entity Framework 4.1 Code First Self-Referencing One-to-Many and Many-to-Many Associations

I have a User that can have collection of users he likes... Another user can have collection of users he likes....[详细]

2023-03-13 10:54 分类：问答
Many-to-many association with multiple self-joins in ActiveRecord

I am trying to implement multiple relations between records of the same model via self-joins (based on @Shtééf\'s answer). I have the following models[详细]

2023-03-12 19:32 分类：问答
Aggregating data with a self-joined table in SQL Server 2008r2

I\'m trying to provide reporting functionality on a typical restaurant type database. I describe the specifics of the problem below, but in a nutshell I need to be able retrieve aggregate data (sums a[详细]

2023-03-11 02:04 分类：问答
Linq self-join and filter

I have a List<ClaimEvent> made up of this class: public class ClaimEvent { public ClaimEventType ClaimEventClaimEventType { get; set; }[详细]

2023-03-10 05:46 分类：问答
LINQ self join in ASP.NET MVC3

I have a situation where I need to do a self join on a table in LINQ. The table consists of fields ItemsID, Title, SeriesTitle, and many other. An item can be either a series or members and I can tell[详细]

2023-03-08 16:51 分类：问答
Why does the number of rows increase in a SELECT statement with INNER JOIN when a second column is selected?

I am writing some queries with self-joins in SQL Server. When I have only one col开发者_开发问答umn in the SELECT clause, the query returns a certain number of rows. When I add another column, from th[详细]

2023-03-08 08:30 分类：问答
join query in same table with condition

I have inserted both category and sub-category in same table. id , name , mainCat , Here is the name of the category .If a user add a subcategory then i will add the parent cate开发者_JAVA技巧gory t[详细]

2023-03-07 23:08 分类：问答
How do I handle self joins with decent_exposure?

I have a Forum model, whose instances can have many nested forums: class Forum < ActiveRecord::Base[详细]

2023-03-02 13:28 分类：问答
UPDATE Using Self Join and Aggregates

I\'m trying to update a table using a self join and aggregates. For example, a tabl开发者_如何学JAVAe has the following columns:[详细]

2023-02-23 13:22 分类：问答
Filtering equivalent but not duplicate rows from MySQL result

To promote bonding in my fraternity, I\'m trying to design a system where people can rate how well they know each other, then it will match up those who know each other least. This is what the table f[详细]

2023-02-14 05:42 分类：问答