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SqlExpressionFactory.Exists Metodo

  • Riferimento

Definizione

Spazio dei nomi:
Microsoft.EntityFrameworkCore.Query
Assembly:
Microsoft.EntityFrameworkCore.Relational.dll
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v8.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v9.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v3.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v3.1.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v5.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v6.0.0
Pacchetto:
Microsoft.EntityFrameworkCore.Relational v7.0.0

Overload

Exists(SelectExpression)

Crea un nuovo ExistsExpression oggetto che rappresenta un'operazione EXISTS in un albero SQL.
Exists(SelectExpression, Boolean)

Crea un nuovo ExistsExpression oggetto che rappresenta un'operazione EXISTS in un albero SQL.

Exists(SelectExpression)

Origine:
SqlExpressionFactory.cs
Origine:
SqlExpressionFactory.cs

Crea un nuovo ExistsExpression oggetto che rappresenta un'operazione EXISTS in un albero SQL.

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression Exists (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression subquery);
public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression Exists (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression subquery);
abstract member Exists : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression
override this.Exists : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression
abstract member Exists : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression
override this.Exists : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression
Public Overridable Function Exists (subquery As SelectExpression) As ExistsExpression
Public Overridable Function Exists (subquery As SelectExpression) As SqlExpression

Parametri

subquery
SelectExpression

Sottoquery per verificare l'esistenza.

Restituisce

ExistsExpression
SqlExpression

Espressione che rappresenta un'operazione EXISTS in un albero SQL.

Implementazioni

Exists(SelectExpression)

Si applica a

Exists(SelectExpression, Boolean)

Origine:
SqlExpressionFactory.cs
Origine:
SqlExpressionFactory.cs
Origine:
SqlExpressionFactory.cs
Origine:
SqlExpressionFactory.cs
Origine:
SqlExpressionFactory.cs

Crea un nuovo ExistsExpression oggetto che rappresenta un'operazione EXISTS in un albero SQL.

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression Exists (Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression subquery, bool negated);
abstract member Exists : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression
override this.Exists : Microsoft.EntityFrameworkCore.Query.SqlExpressions.SelectExpression * bool -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression
Public Overridable Function Exists (subquery As SelectExpression, negated As Boolean) As ExistsExpression

Parametri

subquery
SelectExpression

Sottoquery per verificare l'esistenza.

negated
Boolean

Valore che indica se il controllo di esistenza viene negato.

Restituisce

ExistsExpression

Espressione che rappresenta un'operazione EXISTS in un albero SQL.

Implementazioni

Exists(SelectExpression, Boolean)

Si applica a