Using Synonyms

บทความ
04/03/2023

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics

A synonym is an alternative name for a schema-scoped object. In SMO, synonyms are represented by the Synonym object. The Synonym object is a child of the Database object. This means that synonyms are valid only within the scope of the database in which they are defined. However, the synonym can refer to objects on another database, or on a remote instance of SQL Server.

The object that is given an alternative name is known as the base object. The name property of the Synonym object is the alternative name given to the base object.

Example

For the following code examples, you will have to select the programming environment, programming template and the programming language to create your application. For more information, see Create a Visual C# SMO Project in Visual Studio .NET.

Creating a Synonym in Visual C#

The code example shows how to create a synonym or an alternate name for a schema scoped object. Client applications can use a single reference for the base object via a synonym instead of using a multiple part name to reference the base object.

{  
            //Connect to the local, default instance of SQL Server.   
            Server srv = new Server();  
  
            //Reference the AdventureWorks2022 database.   
            Database db = srv.Databases["AdventureWorks2022"];  
  
            //Define a Synonym object variable by supplying the   
            //parent database, name, and schema arguments in the constructor.   
            //The name is also a synonym of the name of the base object.   
            Synonym syn = new Synonym(db, "Shop", "Sales");  
  
            //Specify the base object, which is the object on which   
            //the synonym is based.   
            syn.BaseDatabase = "AdventureWorks2022";  
            syn.BaseSchema = "Sales";  
            syn.BaseObject = "Store";  
            syn.BaseServer = srv.Name;  
  
            //Create the synonym on the instance of SQL Server.   
            syn.Create();  
        }

Creating a Synonym in PowerShell

#Get a server object which corresponds to the default instance  
$srv = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Server  
  
#And the database object corresponding to Adventureworks  
$db = $srv.Databases["AdventureWorks2022"]  
  
$syn = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Synonym `  
-argumentlist $db, "Shop", "Sales"  
  
#Specify the base object, which is the object on which the synonym is based.  
$syn.BaseDatabase = "AdventureWorks2022"  
$syn.BaseSchema = "Sales"  
$syn.BaseObject = "Store"  
$syn.BaseServer = $srv.Name  
  
#Create the synonym on the instance of SQL Server.  
$syn.Create()

แชร์ผ่าน

Using Synonyms

Example

Creating a Synonym in Visual C#

Creating a Synonym in PowerShell

See Also

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