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Reference: Query Designer Properties

You can modify the appearance and behavior of a query by setting the value of properties in the Properties window. The following tables describe each property.

Name

Description

Number of Results Returned

Indicates whether the query returns one row or multiple rows. Select one of the following values:

  • Many if you intend for this query to return a collection of rows (For example: a collection of customers).

  • One if you intend for this query to return only one row (For example: a customer). If no data matches the conditions of the query, the query returns null or Nothing in Visual Basic. If more than one row of data matches the conditions of the query, an InvalidOperationException is thrown.

Name

The name of the query.

Is Optional

Indicates whether a parameter value is required or optional. Select one of the following values:

  • True if you want the query to exclude filter conditions that use the parameter when the value of the parameter is null.

  • False if you want the query to include filter conditions that use the parameter when the value of the parameter is null. Each row of data will be tested for the presence of a null value.

Applies to query parameters only.

Source

The data source of the query (For example: the Customers entity set).

Return Type

The entity that the query returns when the query is executed.

Name

Description

Description

The text that appears as a tooltip.

Display Name

The name that appears on the screen.

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