Can Linq to SQL/Linq to Entities generate a MERGE statement?
Looking for a combined INSERT/UPDATE/DELETE statement, MERGE is exactly what I need, but I can't seem to find if LINQ/SQL supports it (from http://www.sqlbook.com/SQL-Server/SQL-MERGE-35.aspx)
-- Merge order items into OrderItems table
MERGE INTO OrderItem As oi
USING @UpdatedItems ui
ON (oi.OrderID = ui.OrderID AND oi.ProductID = ui.ProductID)
WHEN MATCHED THEN
UPDATE SET Quantity = ui.Quantity, UnitCost = ui.UnitCost
WHEN 开发者_Python百科NOT MATCHED THEN
INSERT (OrderID, ProductID, Quantity, UnitCost)
VALUES (@OrderID, ui.ProductID, ui.Quantity, ui.UnitCost)
WHEN SOURCE NOT MATCHED THEN
DELETE;
Current version of LINQ to SQL
does not generate a MERGE
statement. You must create a custom Upsert
method in code to do an Upsert
.
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