As you know, Inner join returns only those records or rows that match or exists in both the tables. Ryanm1324 … Add a Solution . linq join on multiple columns For example, if the Orders table and OrderDetails table each used different names for their columns, you could create composite keys by assigning identical names in the anonymous types: C# join...on new {Name = o.CustomerName, ID = o.CustID} equals new {Name = d.CustName, ID = d.CustID } Composite keys can be also used in a group clause. If you include it in you grouped result then you can use it. How to Join Multiple Columns with Linq To SQL - CodeProject I know that exists a lot of solutions about how to create an OUTER JOIN between two DataTables. The Join method, which is called by the join clause in C#, implements an inner join. You just need to make sure the property names match on both types. * From dt1 Inner Join dt2 On dt1.c1 = dt2.c1 AND dt1.c(n) = dt2.c(n) where (n) represents column number (and I’d repeat for each column needed to match) It provides the ability to .NET languages to create queries to retrieve data from the data source. SQL Join Query With LINQ This is how: var query = from c in cases join a in accounts on new { joinColumn1 = c.accountid, joinColumn2 = c.accountnbr } equals new {joinColumn1 = a.accountid, joinColumn2 = a.ccountnbr } on new { CutomerId = order.CustomerId // column 2 } equals new { CutomerId = cust.CustomerId // condition 2 } In Visual Basic, LINQ provides two options for performing an INNER JOIN: an implicit join and an explicit join. Select Column_Names From table_1 Inner join table_2 on table_1.colomn_name=table_2.column_name; LINQ Query Syntax. The first collection … We can group by multiple fields/columns using LINQ in following way, Its very simple, if you have multiple tables to join, first join those tables in linq and get the result set. How to: Combine Data with LINQ by Using Joins - Visual Basic
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