When you use the ADO.Net Entity Data Model wizard to creating the model from the SQL Server database, wizard maps the SQL Server types according to following table:
SQL Server to Entity framework type mapping:
| Sql Server type name | Entity framework Type name |
| bit | Edm.Boolean |
| tinyint | Edm.Byte |
| smallint | Edm.Int16 |
| int | Edm.Int32 |
| bigint | Edm.Int64 |
| float | Edm.Double |
| real | Edm.Double |
| decimal | Edm.Decimal |
| numeric | Edm.Decimal |
| smallmoney | Edm.Decimal |
| money | Edm.Decimal |
| binary | Edm.Binary |
| varbinary | Edm.Binary |
| varbinary(max) (Not supported in SQL Server 2000) | Edm.Binary |
| image | Edm.Binary |
| timestamp | Edm.Binary |
| rowversion | Edm.Binary |
| smalldatetime | Edm.DateTime |
| datetime | Edm.DateTime |
| date (Not supported in SQL Server 2000, 2005) | Edm.DateTime |
| time (Not supported in SQL Server 2000, 2005) | Edm.Time |
| datetime2 (Not supported in SQL Server 2000, 2005) | Edm.DateTime |
| datetimeoffset (Not supported in SQL Server 2000, 2005) | Edm.DateTimeOffset |
| nvarchar (Not supported in SQL Server 2000) | Edm.String |
| varchar (Not supported in SQL Server 2000) | Edm.String |
| char | Edm.String |
| nchar | Edm.String |
| varchar(max) | Edm.String |
| nvarchar(max) | Edm.String |
| ntext | Edm.String |
| text | Edm.String |
| Unique identifier | Edm.Guid |
| xml | Edm.String |