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! (NOT) (Entity SQL)

  • Artykuł

Negates a Boolean expression.

NOT boolean_expression
or
! boolean_expression

Arguments

  • boolean_expression
    Any valid expression that returns a Boolean.

Remarks

The exclamation point (!) has the same functionality as the NOT operator.

Example

The following Entity SQL query uses the NOT operator to negates a Boolean expression. The query is based on the AdventureWorks Sales Model. To compile and run this query, follow these steps:

  1. Follow the procedure in How to: Execute a Query that Returns StructuralType Results (EntityClient).

  2. Pass the following query as an argument to the ExecuteStructuralTypeQuery method:

\\ NOT
SELECT VALUE product FROM AdventureWorksEntities.Product 
                                    AS product where product.ListPrice > 50 AND NOT (product.ListPrice = 90)
\\ !
SELECT VALUE product FROM AdventureWorksEntities.Product 
                                    AS product where product.ListPrice > 50 AND ! (product.ListPrice = 90)

The output is shown below:

ProductID: 514
Name: LL Mountain Seat Assembly
ProductNumber: SA-M198
MakeFlag: True
ProductID: 515
Name: ML Mountain Seat Assembly
ProductNumber: SA-M237
MakeFlag: True
ProductID: 516
Name: HL Mountain Seat Assembly
ProductNumber: SA-M687
MakeFlag: True
ProductID: 517
Name: LL Road Seat Assembly
ProductNumber: SA-R127
MakeFlag: True
ProductID: 518
Name: ML Road Seat Assembly
ProductNumber: SA-R430
MakeFlag: True

See Also

Concepts

Entity SQL Reference

Other Resources

Logical Operators