Статья
09/28/2010

Класс Database

The Database object represents a SQL Server database.

Пространство имен: Microsoft.SqlServer.Management.Smo
Сборка: Microsoft.SqlServer.Smo (в Microsoft.SqlServer.Smo.dll)

Синтаксис

'Декларация
<EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)> _
<PhysicalFacetAttribute> _
Public NotInheritable Class Database _
    Inherits ScriptNameObjectBase _
    Implements ICreatable, IAlterable, IDroppable, IRenamable,  _
    IExtendedProperties, IScriptable, IDatabaseOptions, IDmfFacet, IPropertyDataDispatch
'Применение
Dim instance As Database

[EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)]
[PhysicalFacetAttribute]
public sealed class Database : ScriptNameObjectBase, 
    ICreatable, IAlterable, IDroppable, IRenamable, IExtendedProperties, 
    IScriptable, IDatabaseOptions, IDmfFacet, IPropertyDataDispatch

[EvaluationModeAttribute(AutomatedPolicyEvaluationMode::CheckOnSchedule)]
[PhysicalFacetAttribute]
public ref class Database sealed : public ScriptNameObjectBase, 
    ICreatable, IAlterable, IDroppable, IRenamable, IExtendedProperties, 
    IScriptable, IDatabaseOptions, IDmfFacet, IPropertyDataDispatch

[<SealedAttribute>]
[<EvaluationModeAttribute(AutomatedPolicyEvaluationMode.CheckOnSchedule)>]
[<PhysicalFacetAttribute>]
type Database =  
    class
        inherit ScriptNameObjectBase
        interface ICreatable
        interface IAlterable
        interface IDroppable
        interface IRenamable
        interface IExtendedProperties
        interface IScriptable
        interface IDatabaseOptions
        interface IDmfFacet
        interface IPropertyDataDispatch
    end

public final class Database extends ScriptNameObjectBase implements ICreatable, IAlterable, IDroppable, IRenamable, IExtendedProperties, IScriptable, IDatabaseOptions, IDmfFacet, IPropertyDataDispatch

Замечания

The Database class represents databases, either system or user-defined, on the instance of SQL Server. The Server class is the parent of the Database class.

By using the Database class, you can do the following:

Create a new database or drop and existing database.
Register the database in the Active Directory directory service.
Reference database objects in collections, such as tables, users, and triggers.
Set up database mirroring.
Create a master database key.
Set up a full-text search catalog.
Check data, allocations, catalogs, and tables.
Issue a checkpoint.
Grant, revoke, and deny permissions to users on the database.
Run Transact-SQL statements.
Enumerate database information, such as locks or object permissions.
Remove the backup history.
Monitor the number of transactions.
Set the database offline or online.
Change the owner of the database.
Update statistics.
Shrink the database.
Truncate the log.
Script the database.

To get Database object properties, a login must be a member of the public fixed server role and the user mapped to this login in the database must be a member of the public database role.

To set Database object properties and run the Alter method, users must have ALTER permission on the database, or be a member of the db_owner fixed database role.

To create a database, users must have CREATE DATABASE, CREATE ANY DATABASE, or ALTER ANY DATABASE permission on the parent server.

To drop a database, users must have CONTROL permission on the database, or be a member of the db_owner fixed database role.

To grant, revoke, or deny other users permission on the database, users must have CONTROL permission on the database or be a member of the db_owner fixed database role.

Thread Safety

Все общие статические члены этого типа (Shared в Microsoft Visual Basic) можно использовать в многопоточных операциях. Безопасная многопоточная работа с членами экземпляров типа не гарантируется.

Примеры

'Connect to the local, default instance of SQL Server.
Dim srv As Server
srv = New Server
'Define a Database object variable by supplying the server and the database name arguments in the constructor.
Dim db As Database
db = New Database(srv, "Test_SMO_Database")
'Create the database on the instance of SQL Server.
db.Create()
'Reference the database and display the date when it was created.
db = srv.Databases("Test_SMO_Database")
Console.WriteLine(db.CreateDate)
'Remove the database.
db.Drop()