在c#中比较sql server的数据类型和ms访问

Question

有没有方法可以比较两个不同数据库的数据类型.

Answer 1

Jet Engine (Access) | Sql-Server                          | C#
--------------------+-------------------------------------+--------------------
Text (len < 256)    | char, nchar, varchar, nvarchar      | string
Memo                | text, ntext, the above with len>255 | string
Byte                | tinyint                             | byte
Integer             | smallint                            | short
Long Integer        | integer (int)                       | int
Single              | real                                | float
Double              | float                               | double
Replication ID      | uniqueidentifier                    | Guid
Decimal             | decimal                             | decimal
Date/Time           | smalldatetime, datetime, datetime2  | DateTime
Binary     (8 bytes)| timestamp, rowversion (Since V2008) | byte[]    (8 bytes)
Currency            | smallmoney, money                   | decimal
AutoNumber          | int + identity property             | int
Yes/No              | bit                                 | bool
OLE Object          | image                               | byte[]
Hyperlink           | <no equivalent>                     | string
<no equivalent>     | binary, varbinary                   | byte[]

我从如何从Access迁移到SQL Server 2000中获取此信息并添加了c#列.

另请注意,大多数类型在数据库中都可以为空.除非.NET类型是引用类型,否则将Cull中的可空列映射到Nullable<T>(T?).