I have 4 SQL tables as follows.
基本上,登记包含所有这些任择表格的数据,但每个任择表格都通过外国钥匙持有不同的额外数据。
利用LINQ至QQ,选择与这一选择表有关的登记的最佳方式是什么?
Pseudo-code would be
select all registrations where an entry in table [x] exists
Appreciate your help
Marko
var results = from r in dc.Registration
join o1 in dc.Optional1 on r.RegistrationID equals o1.RegistrationID
select r;只有在登记记录与任择表1的相关记录有关系时,才能归还登记记录。
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