Aggregation is a relationship between two classes that is best described as a "has-a" and "whole/part" relationship.
What is the difference between association, aggregation, and composition? Please explain in terms of implementation.
oop uml associations aggregation compositionWhy prefer composition over inheritance? What trade-offs are there for each approach? When should you choose inheritance over composition?
language-agnostic oop inheritance composition aggregationI am trying to accomplish the following in MySQL (see pseudo code) SELECT DISTINCT gid FROM `gd` WHERE COUNT(*) > 10 …
mysql count aggregation havingI'm aware of the conceptual differences between Aggregation and Composition. Can someone tell me the implementation difference in Java between …
java relationship aggregation compositionThere are two schools of thought on how to best extend, enhance, and reuse code in an object-oriented system: Inheritance: …
oop inheritance language-agnostic aggregationI'm trying to list all buckets on an aggregation, but it seems to be showing only the first 10. My search: …
elasticsearch aggregationI have a table that looks like this: A 1 A 2 B 1 B 2 And I want to produce a result set …
sql oracle aggregation string-concatenationI am reviewing my knowledge in object-oriented programming. Under the relationship between classes topic, I have encountered some relationships which …
oop uml aggregation composition model-associationsBasically, I am trying the following: SELECT m.col1, SUM(SELECT col5 FROM table WHERE col2 = m.col1) FROM table …
mysql subquery aggregationHere I am, with another question about aggregation and association. I wanted to learn some basics of UML, so I …
uml associations aggregation