Bagikan melalui

SqlExpressionFactory.Exists Metode

  • Referensi

Definisi

Ruang nama:
Microsoft.EntityFrameworkCore.Query
Rakitan:
Microsoft.EntityFrameworkCore.Relational.dll
Paket:
Microsoft.EntityFrameworkCore.Relational v8.0.0
Paket:
Microsoft.EntityFrameworkCore.Relational v3.0.0
Paket:
Microsoft.EntityFrameworkCore.Relational v3.1.0
Paket:
Microsoft.EntityFrameworkCore.Relational v5.0.0
Paket:
Microsoft.EntityFrameworkCore.Relational v6.0.0
Paket:
Microsoft.EntityFrameworkCore.Relational v7.0.0

Overload

Exists(SelectExpression)

Membuat baru ExistsExpression yang mewakili operasi EXISTS di pohon SQL.
Exists(SelectExpression, Boolean)

Membuat baru ExistsExpression yang mewakili operasi EXISTS di pohon SQL.

Exists(SelectExpression)

Membuat baru ExistsExpression yang mewakili operasi EXISTS di pohon SQL.

public virtual Microsoft.EntityFrameworkCore.Query.SqlExpressions.ExistsExpression 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
Public Overridable Function Exists (subquery As SelectExpression) As ExistsExpression

Parameter

subquery
SelectExpression

Subkueri untuk memeriksa keberadaan.

Mengembalikan

ExistsExpression

Ekspresi yang mewakili operasi EXISTS di pohon SQL.

Penerapan

Exists(SelectExpression)

Berlaku untuk

Exists(SelectExpression, Boolean)

Membuat baru ExistsExpression yang mewakili operasi EXISTS di pohon 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

Parameter

subquery
SelectExpression

Subkueri untuk memeriksa keberadaan.

negated
Boolean

Nilai yang menunjukkan apakah pemeriksaan keberadaan dinegasikan.

Mengembalikan

ExistsExpression

Ekspresi yang mewakili operasi EXISTS di pohon SQL.

Penerapan

Exists(SelectExpression, Boolean)

Berlaku untuk