How would I replicate the following in Linq, a select in statement:
SELECT * FROM Products WHERE Products.ProductID IN(5,7,8,12)
Anyone?
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I know this question's already been accepted, but I just wanted to point out that the "IN" keyword actually is supported in LINQ. I don't have Visual Basic installed here so I can't test it there, but the solution in C# is:
from p in db.Products
where
new int[] { 5, 7, 8, 12 }.Contains(p.ProductID)
select p
The SQL generated for this query is:
SELECT [t0].[ProductID]
FROM [dbo].[Product] AS [t0]
WHERE ([t0].[ProductID]) IN (@p0, @p1, @p2, @p3)
Hope this helps.
Well, this doesn't generate quite the same query, but it should be equivalent...
from p in data.Products
where
(from tablex in data.Tablex select tablex.Fieldx).Contains(p.
select p).CommandText
This generates the following query:
SELECT [t0].[ProductID]
FROM [dbo].[Product] AS [t0]
WHERE NOT (EXISTS(
SELECT NULL AS [EMPTY]
FROM [dbo].[Tablex] AS [t1]
WHERE [t1].[Fieldx] = ([t0].[ProductID])
))
NOT (EXISTS( SELECT...)) should be equivalent to your original query, so I suspect this will do the trick for you. Note that I'm not looking any of this up, I'm just reading your original query and thinking about how I would represent it in C#...LINQ is really extremely intuitive in this way. In C#, you use the Contains() method to find out if one value belongs to a collection of other values -- if you want to find out if it is NOT in that collection, you check !Contains(). If you want to append multiple clauses together, you use "&&" -- the same applies here.
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by: MasteracoPosted on 2007-12-13 at 10:42:28ID: 20466444
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