Question

Can anyone tell me how to write a nested SQL query like

SELECT * FROM X WHERE X.ID IN (SELECT Y.XID FROM Y WHERE …..)

in LINQ?

Answer 1

You could try:

var yIds = from y in dataContext.Y            where ...            select y.XId;  var query = from x in dataContext.X             where yIds.Contains(x.Id)             select x; 

I don’t know whether it will work though – any reason why you don’t want to just do a join instead? For instance:

var query = from x in dataContext.X             join y in dataContext.Y.Where(...) on x.Id equals y.Xid             select x;