Multiple relationships between 2 tables in report model

Question

if i have 2 relationships between the same two tables. how do i use one over the other?
for example, i have 2 tables order and ordeDate table , with the definition of:
order table:
orderid int,
qty int,
orderdate date)
and orderDate table:
(id int,
endOfDay date,
endOfMonth date)
i created one relation ship as orderDate = endOfDay and anothe relationship as orderDate = endOfMonth. some of my reports would need to use the relationship between orderDate = endOfDay and the month end reports would need to use yhe relationship between
orderDate = endOfMonth. How do I select one relationship over the other when building the report?
Ideally the database should have been redesigned, which cannot be done at the moment as this will be done on the next project

Answer 1

Your table design is completly wrong. I am now sure how you are maintaining OrderDate table. SQL Server is RDBMS. Without relation how will you pick those rows from Order table whose order date is equal exactly equal to datefield in OrderDate table. The
only way is to derived endofDay and endofMonth in the select query directly. I understand endofMonth. But what is EndofDay ? And that too a date datatype ??
You can run the below query but it will not return specific order date from order table,
SELECT * FROM [ORDER] WHERE
CONVERT(CHAR(10),ORDERDATE,101) IN (SELECT CONVERT(CHAR(10),endOfDay,101) FROM ORDERDATE)
SELECT * FROM [ORDER] WHERE
CONVERT(CHAR(10),ORDERDATE,101) IN (SELECT CONVERT(CHAR(10),endOfMonth,101) FROM ORDERDATE)
Even if i JOIN the two table by orderdate and endofDay/endofMonth, we will not received specific orderDate. And this is becouse if your Order table contains multiple orderDate that are matching to either endofDay or endofMonth, the final output will contain
multiple orderDate details. I don't think this is what you need. Therefore you need to modify the OrderDate table or provide us the definition for endofDay and endofMonth, and how are you maintaining.
Regards, RSingh