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DefaultConstraint 類別

The DefaultConstraint object represents a SQL Server default constraint.

命名空間：  Microsoft.SqlServer.Management.Smo
組件：  Microsoft.SqlServer.Smo (在 Microsoft.SqlServer.Smo.dll 中)

語法

'宣告
<SfcElementTypeAttribute("Default")> _
Public NotInheritable Class DefaultConstraint _
    Inherits ScriptNameObjectBase _
    Implements ICreatable, IDroppable, IRenamable, IAlterable,  _
    IExtendedProperties, IScriptable
'用途
Dim instance As DefaultConstraint

[SfcElementTypeAttribute("Default")]
public sealed class DefaultConstraint : ScriptNameObjectBase, 
    ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, 
    IScriptable

[SfcElementTypeAttribute(L"Default")]
public ref class DefaultConstraint sealed : public ScriptNameObjectBase, 
    ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, 
    IScriptable

[<SealedAttribute>]
[<SfcElementTypeAttribute("Default")>]
type DefaultConstraint =  
    class
        inherit ScriptNameObjectBase
        interface ICreatable
        interface IDroppable
        interface IRenamable
        interface IAlterable
        interface IExtendedProperties
        interface IScriptable
    end

public final class DefaultConstraint extends ScriptNameObjectBase implements ICreatable, IDroppable, IRenamable, IAlterable, IExtendedProperties, IScriptable

備註

To get DefaultConstraint object properties, users can be members of the public fixed server role.

To set DefaultConstraint object properties, users must have ALTER permission on the parent table or be a member of the db_owner fixed database role.

To create or drop a default constraint, users must have ALTER permission on the parent table or be a member of the db_owner fixed database role.

Thread Safety

這種類型的任何公用靜態 (在 Microsoft Visual Basic 中則為 Shared) 成員都可用於多執行緒作業。並不是所有的執行個體成員都保證可以用於所有的執行緒。

執行緒安全性

這個類型的任何公用static (在 Visual Basic 中為 Shared) 成員都是安全執行緒。不保證任何執行個體成員都可以是安全執行緒。