创建、更改和删除架构

Schema 对象表示数据库对象的所有权上下文。 Database 对象的 Schemas 属性表示 Schema 对象的集合。

示例

若要使用所提供的任何代码示例，您必须选择创建应用程序所需的编程环境、编程模板和编程语言。 有关详细信息，请参阅在 Visual Studio .NET 中创建 Visual Basic SMO 项目或在 Visual Studio .NET 中创建 Visual C# SMO 项目。

在 Visual Basic 中创建、更改和删除架构

此代码示例说明如何创建架构并将其分配给数据库对象。 接着，程序向用户授予权限，然后在该架构中创建一个新表。

'Connect to the local, default instance of SQL Server.
Dim srv As Server
srv = New Server
'Reference the AdventureWorks2012database.
Dim db As Database
db = srv.Databases("AdventureWorks2012")
'Define a Schema object variable by supplying the parent database and name arguments in the constructor.
Dim sch As Schema
sch = New Schema(db, "MySchema1")
sch.Owner = "dbo"
'Create the schema on the instance of SQL Server.
sch.Create()
'Define an ObjectPermissionSet that contains the Update and Select object permissions.
Dim obperset As ObjectPermissionSet
obperset = New ObjectPermissionSet()
obperset.Add(ObjectPermission.Select)
obperset.Add(ObjectPermission.Update)
'Grant the set of permissions on the schema to the guest account.
sch.Grant(obperset, "guest")
'Define a Table object variable by supplying the parent database, name and schema arguments in the constructor.
Dim tb As Table
tb = New Table(db, "MyTable", "MySchema1")
Dim mycol As Column
mycol = New Column(tb, "Date", DataType.DateTime)
tb.Columns.Add(mycol)
tb.Create()
'Modify the owner of the schema and run the Alter method to make the change on the instance of SQL Server.
sch.Owner = "guest"
sch.Alter()
'Run the Drop method for the table and the schema to remove them.
tb.Drop()
sch.Drop()

在 Visual C# 中创建、更改和删除架构

此代码示例说明如何创建架构并将其分配给数据库对象。 接着，程序向用户授予权限，然后在该架构中创建一个新表。

{
         //Connect to the local, default instance of SQL Server. 
         Server srv = new Server(); 
        //Reference the AdventureWorks2012 database. 
        Database db = srv.Databases["AdventureWorks2012"]; 
        //Define a Schema object variable by supplying the parent database and name arguments in the constructor. 
        Schema sch = new Schema(db, "MySchema1"); 
        sch.Owner = "dbo"; 

        //Create the schema on the instance of SQL Server. 
        sch.Create(); 

        //Define an ObjectPermissionSet that contains the Update and Select object permissions. 
        ObjectPermissionSet obperset = new ObjectPermissionSet(); 
        obperset.Add(ObjectPermission.Select); 
        obperset.Add(ObjectPermission.Update); 

        //Grant the set of permissions on the schema to the guest account. 
        sch.Grant(obperset, "guest"); 

        //Define a Table object variable by supplying the parent database, name and schema arguments in the constructor. 
        Table tb = new Table(db, "MyTable", "MySchema1"); 
       Column mycol = new Column(tb, "Date", DataType.DateTime); 
        tb.Columns.Add(mycol); 
        tb.Create(); 

        //Modify the owner of the schema and run the Alter method to make the change on the instance of SQL Server. 
        sch.Owner = "guest"; 
        sch.Alter(); 

        //Run the Drop method for the table and the schema to remove them. 
        tb.Drop(); 
        sch.Drop(); 
}

在 PowerShell 中创建、更改和删除架构

此代码示例说明如何创建架构并将其分配给数据库对象。 接着，程序向用户授予权限，然后在该架构中创建一个新表。

# Set the path context to the local, default instance of SQL Server and get a reference to AdventureWorks2012
CD \sql\localhost\default\databases
$db = get-item Adventureworks2012

# Define a schema object variable by supplying the parent database and name arguments in the constructor. 
$sch  = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Schema `
-argumentlist $db, "MySchema1"

# Set schema owner
$sch.Owner = "dbo" 

# Create the schema on the instance of SQL Server. 
$sch.Create()

# Define an ObjectPermissionSet that contains the Update and Select object permissions. 
$obperset  = New-Object -TypeName Microsoft.SqlServer.Management.SMO.ObjectPermissionSet
$obperset.Add([Microsoft.SqlServer.Management.SMO.ObjectPermission]::Select)
$obperset.Add([Microsoft.SqlServer.Management.SMO.ObjectPermission]::Update)

# Grant the set of permissions on the schema to the guest account. 
$sch.Grant($obperset, "guest")

#Create a SMO Table with one column and add it to the database
$tb = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Table -argumentlist $db, "MyTable", "MySchema1"
$Type = [Microsoft.SqlServer.Management.SMO.DataType]::DateTime
$mycol =  New-Object -TypeName Microsoft.SqlServer.Management.SMO.Column -argumentlist $tb,"Date", $Type
$tb.Columns.Add($mycol)
$tb.Create() 

# Modify the owner of the schema and run the Alter method to make the change on the instance of SQL Server. 
$sch.Owner = "guest"
$sch.Alter()

# Run the Drop method for the table and the schema to remove them. 
$tb.Drop()
$sch.Drop()