Microsoft SQL Server 2005 Compact Edition (SQL Server Compact Edition) does not fully support all .NET data types; when data is accessed by using ADO.NET, SQL Server Compact Edition must translate unsupported types to those that are supported.
Data Type Mappings The following table shows the data type mappings between SQL Server Compact Edition and the .NET data provider.
| .NET Data Type | SQL Server Compact Edition Data Type |
|---|---|
|
binary |
varbinary |
|
boolean |
bit |
|
byte |
tinyint |
|
byte[] |
varbinary |
|
datetime |
datetime |
|
decimal |
numeric |
|
double |
float |
|
guid |
uniqueidentifier |
|
image |
image |
|
int16 |
smallint |
|
Uint16 |
uint16 |
|
int32 |
int |
|
Uint32 |
uint32 |
|
int64 |
bigint |
|
Uint64 |
uint64 |
|
SqlBinary |
varbinary |
|
SqlBoolean |
bit |
|
SqlByte |
tinyint |
|
SqlDecimal¹ |
numeric |
|
SqlDateTime |
datetime |
|
SqlDouble |
float |
|
SqlGuid |
uniqueidentifier |
|
SqlInt16 |
smallint |
|
SqlInt32 |
int |
|
SqlInt64 |
bigint |
|
SqlMoney |
money |
|
SqlSingle |
real |
|
SqlString |
nvarchar |
|
single |
real |
|
string |
nvarchar |
¹ SQL Server Compact Edition supports SqlDecimal data type only up to 96 bits. If 96 bits are exceeded, SQL Server Compact Edition throws an overflow exception error.