How add and condition in LINQ query join?

We can apply join on multiple table on condition base.

1. var q = (from product in dataContext.Products join order in dataContext.Orders on product.ProductId equals order.ProductId join cust in dataContext.Customers on order.CustomerId equals cust.CustomerId orderby order.OrderId select new {
2. order.OrderId,

Can I use condition in SQL JOIN?

When the Join condition is met, it returns matched rows in both tables with the selected columns in the SELECT clause. SQL Inner Join clause is the same as Join clause and works the same way if we don’t specify the type (INNER) while using the Join clause.

How do I join a query in LINQ?

In a LINQ query expression, join operations are performed on object collections. Object collections cannot be “joined” in exactly the same way as two relational tables. In LINQ, explicit join clauses are only required when two source sequences are not tied by any relationship.

How do I join two tables in LINQ?

Basically in SQL, we use the INNER JOIN keyword to make relationship between both tables.

1. SELECT [t1].[OrderId], [t1].[OrderNumber], [tsql-join-query-with-linq].[ProductName], [t1].[Quantity], [t1].[TotalAmount], [t1].[OrderDate]
2. FROM [Product] AS [tsql-join-query-with-linq]
3. INNER JOIN [Orders] AS [t1]

WHERE is IEnumerable?

Where() returns a new IEnumerable . It is a filtered version (a projection) of the original sequence, and original is left unchanged. ToList() returns a new list using the projection. It’s also important to note that calling .

What does on do in SQL?

ON Clause can be used to join columns that have different names. We use ON clause to specify a join condition. This lets us specify join conditions separate from any search or filter conditions in the WHERE clause.

Does WHERE come before or after join?

If you move the same filter to the WHERE clause, you will notice that the filter happens after the tables are joined. The result is that the 1000memories row is joined onto the original table, but then it is filtered out entirely (in both tables) in the WHERE clause before displaying results.