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Finance | Project Operations, Human Resources, ...
Suggested Answer

Union 2 table avoid dupplicate item except item match condition

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Hi,

I have 2 table Customer and MergedCustomer, because of business, I have to union those tables on there conditions:

MergedCustomer.CustId not in Customer.CustId.

OR (MergedCustomer.CustId in Customer.CustId And Customer.Age >= 40 And Customer.Age <= 50.

Is there anyway to write a Query to do this?

I try to google it but there is no suitable solution. 

So thank you really much if you help me. 

By the way, thank for reading my poor English post, it's not my native English so probably it seems silly sometime.

I have the same question (0)
  • Suggested answer
    ergun sahin Profile Picture
    8,826 Moderator on at

    while select MergedCustomer
    notexists join Customer
    where Customer.CustomerId == MergedCustomer.CustomerId
       &&(Customer.Age < 40
       || Customer.Age > 50)
    {
    }

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