Distinct Clause (Visual Basic)
Restricts the values of the current range variable to eliminate duplicate values in subsequent query clauses.
Syntax
Distinct
Remarks
You can use the Distinct
clause to return a list of unique items. The Distinct
clause causes the query to ignore duplicate query results. The Distinct
clause applies to duplicate values for all return fields specified by the Select
clause. If no Select
clause is specified, the Distinct
clause is applied to the range variable for the query identified in the From
clause. If the range variable is not an immutable type, the query will only ignore a query result if all members of the type match an existing query result.
Example
The following query expression joins a list of customers and a list of customer orders. The Distinct
clause is included to return a list of unique customer names and order dates.
Dim customerOrders = From cust In customers, ord In orders
Where cust.CustomerID = ord.CustomerID
Select cust.CompanyName, ord.OrderDate
Distinct
See also
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