Question

I have these tables

CREATE TABLE parent
( 
     id               NUMBER(10, 0) NOT NULL, 
     name             VARCHAR2(100 CHAR) NOT NULL, 
     primary key (id), 
)

CREATE TABLE child
( 
     id               NUMBER(10, 0) NOT NULL, 
     name             VARCHAR2(100 CHAR) NOT NULL, 
     conclusion       DATE,
     parent_id        NUMBER(10, 0) NOT NULL,
)

ALTER TABLE child ADD constraint foreign key (parent_id) references parent; 

I want to get a List<Parent> where each Parent.Child has only elements where !CONCLUSION.HasValue()

Answer 1

A second option is to

var parents = context.Parents.ToList();
foreach(var parent in parents)
{
    var invalidChildren = parent.CHILD
        .Where(child => child.CONCLUSION.HasValue())
        .ToArray();
    foreach(var invalid in invalidChildren)
    {
        parent.CHILD.Remove(invalid);
    }
}