Top "Union" questions

Use this tag only for questions about UNION, a keyword of the SQL language for combining the results of multiple SQL queries.

Library for polygon operations

I've recently encountered a need for a library or set of libraries to handle operations on 2D polygons. I need …

union polygon clipping triangulation
How to union SELECT two tables with ids of both tables?

Ok, I have four tables: Table 1: "f_withholdings" Table 2: "f_wh_list" Table 3: "f_rpayments" Table 4: "f_rp_list" Table 1 …

sql mysql union union-all
How do I correctly use EF Core with AutoMapper ProjectTo and Unions?

My Setup ASP.NET Core 2.0 EntityFrameworkCore 2.0.1 AutoMapper 6.2.2 Problem I have a project with a DTO called PersonDetail and an Entity …

automapper union asp.net-core-2.0 projection ef-core-2.0
Union of multiple ranges

I have these ranges: 7,10 11,13 11,15 14,20 23,39 I need to perform a union of the overlapping ranges to give ranges that are not …

python range union
run a sparql query against two graphs?

A typical SPARQL query that specifies a graph might look like this: SELECT ?b ?c WHERE { GRAPH <http://AliceIRI&…

graph union sparql
Union with NHibernate and Criteria?

Union with NHibernate and Criteria: Is it possible in Criteria or QueryOver? If not, is there any other way to …

c# nhibernate union nhibernate-criteria
Java: Is there an easy, quick way to AND, OR, or XOR together sets?

That is, if I had two or more sets, and I wanted to return a new set containing either: All …

java union set intersection
How do I write a UNION chain with ActiveRelation?

I need to be able to chain an arbitrary number of sub-selects with UNION using ActiveRelation. I'm a little confused …

ruby-on-rails ruby-on-rails-3 union active-relation
Bag Class Implementation in Java/Using Array

I am having some difficulty understanding my assignment and I just want to make sure I am doing it correctly …

java arrays union bag
What is a designated initializer in C?

I know this might be a basic question. I have an assignment that requires me to understand what a Designated …

c struct union initializer designated-initializer