C# .NET and SQL Server supported data types
Applies to: SQL Server 2019 (15.x) and later versions
This article maps SQL Server data types to .NET data types (used by C#) for data structures and parameters on sp_execute_external_script.
The following SQL and .NET data types are currently supported for input/output data sets and input/output parameters.
SQL Server data type | .NET data type | Comment |
---|---|---|
bit | bool |
|
tinyint | byte |
|
smallint | short |
|
int | int |
|
real | float |
|
bigint | long |
|
float | double |
|
nchar(n) | string |
|
nvarchar(n) | string |
|
binary(n) | byte[] |
|
varbinary(n) | byte[] |
|
nvarchar(max) | string |
|
varbinary(max) | byte[] |
|
uniqueidentifier | Guid |
|
char(n) | string |
|
varchar(n) | string |
|
varchar(max) | string |
|
date | DateOnly |
.NET 6 and later versions |
time | TimeOnly |
.NET 6 and later versions |
numeric | decimal |
|
decimal | decimal |
|
money | decimal |
|
smallmoney | decimal |
|
smalldatetime | DateTime |
|
datetime | DateTime |
|
datetime2 | DateTime |