可以使用常规查询语法从 Transact-SQL 语言访问 SQL Server 中的用户定义的类型(UDT)功能。 UDT 可用于数据库对象的定义、作为 Transact-SQL 批处理中的变量、函数和存储过程中的变量,以及函数和存储过程中的参数。在本部分中展开表 品描述 定义用户定义的类型(U...
using System; using System.Data; using System.Data.SqlTypes; using Microsoft.SqlServer.Server; using System.Text; [Serializable] [Microsoft.SqlServer.Server.SqlUserDefinedType(Format.Native, IsByteOrdered=true, ValidationMethodName = "ValidatePoint")] public struct Po...
Applies to: SQL ServerYou can access user-defined type (UDT) functionality in Microsoft SQL Server from the Transact-SQL language by using regular query syntax. UDTs can be used in the definition of database objects, as variables in Transact-SQL b...
Microsoft.SqlServer.Server.SqlUserDefinedTypeAttribute是必要項目。Serializable屬性是選擇性的。 您還可指定Microsoft.SqlServer.Server.SqlFacetAttribute,以提供 UDT 之傳回類型的相關資訊。 如需詳細資訊,請參閱CLR 常式的自訂屬性。 Point UDT 屬性...
Data Types in SQL Server something that a intermediate SQL user should, in SQL alone (go to "Programmability | Types | User-defined Data Types " in SQL Server, use a User-Defined type (UDT) in Microsoft SQL Server, you must register it., SQL Server Alias data types, and is intended ...
This topic describes how to create and drop common language runtime (CLR) user-defined types in SQL Server. Creating User-defined Types To create a user-defined type in SQL Server, the following steps must be performed in order: Define the user-defined type as a class or structure in a ...
是变长字符型么？修改长度有个要求，就是这个字段上不能有约束。主键或者外键，都不行。SQLSERVER修改语法：alter table 表名 alter column 字段名 varchar(新长度)ORACLE alter table 表名 modify 字段名 varchar2(新长度)
This topic provides reference information about user-defined types and table-valued parameters in Microsoft SQL Server and their compatibility with Amazon Aurora MySQL. It explains the differences in feature support between SQL Server and Aurora MySQL, h
Use Object Explorer to create new user-defined data types. To create a user-defined data type In Object Explorer, expandDatabases, expand a database, expandProgrammability, expandTypes, right-clickUser-defined Data Types, and then clickNew User-defined Data Type. ...
inside SQL Server that is programmed against an assembly created in the Microsoft .NET Framework common language runtime (CLR). Database objects that can take advantage of the rich programming model provided by the CLR include triggers, stored procedures, functions, aggregate functions, and types....