SqlDbType Enumeration

Specifies SQL Server-specific data type of a field, property, for use in a SqlParameter.


Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)

	Member name	Description
	BigInt	Int64. A 64-bit signed integer.
	Binary	Array of type Byte. A fixed-length stream of binary data ranging between 1 and 8,000 bytes.
	Bit	Boolean. An unsigned numeric value that can be 0, 1, or null.
	Char	String. A fixed-length stream of non-Unicode characters ranging between 1 and 8,000 characters.
	DateTime	DateTime. Date and time data ranging in value from January 1, 1753 to December 31, 9999 to an accuracy of 3.33 milliseconds.
	Decimal	Decimal. A fixed precision and scale numeric value between -10 38 -1 and 10 38 -1.
	Float	Double. A floating point number within the range of -1.79E +308 through 1.79E +308.
	Image	Array of type Byte. A variable-length stream of binary data ranging from 0 to 2 31 -1 (or 2,147,483,647) bytes.
	Int	Int32. A 32-bit signed integer.
	Money	Decimal. A currency value ranging from -2 63 (or -9,223,372,036,854,775,808) to 2 63 -1 (or +9,223,372,036,854,775,807) with an accuracy to a ten-thousandth of a currency unit.
	NChar	String. A fixed-length stream of Unicode characters ranging between 1 and 4,000 characters.
	NText	String. A variable-length stream of Unicode data with a maximum length of 2 30 - 1 (or 1,073,741,823) characters.
	NVarChar	String. A variable-length stream of Unicode characters ranging between 1 and 4,000 characters. Implicit conversion fails if the string is greater than 4,000 characters. Explicitly set the object when working with strings longer than 4,000 characters. Use NVarChar when the database column is nvarchar(max).
	Real	Single. A floating point number within the range of -3.40E +38 through 3.40E +38.
	UniqueIdentifier	Guid. A globally unique identifier (or GUID).
	SmallDateTime	DateTime. Date and time data ranging in value from January 1, 1900 to June 6, 2079 to an accuracy of one minute.
	SmallInt	Int16. A 16-bit signed integer.
	SmallMoney	Decimal. A currency value ranging from -214,748.3648 to +214,748.3647 with an accuracy to a ten-thousandth of a currency unit.
	Text	String. A variable-length stream of non-Unicode data with a maximum length of 2 31 -1 (or 2,147,483,647) characters.
	Timestamp	Array of type Byte. Automatically generated binary numbers, which are guaranteed to be unique within a database. timestamp is used typically as a mechanism for version-stamping table rows. The storage size is 8 bytes.
	TinyInt	Byte. An 8-bit unsigned integer.
	VarBinary	Array of type Byte. A variable-length stream of binary data ranging between 1 and 8,000 bytes. Implicit conversion fails if the byte array is greater than 8,000 bytes. Explicitly set the object when working with byte arrays larger than 8,000 bytes.
	VarChar	String. A variable-length stream of non-Unicode characters ranging between 1 and 8,000 characters. Use VarChar when the database column is varchar(max).
	Variant	Object. A special data type that can contain numeric, string, binary, or date data as well as the SQL Server values Empty and Null, which is assumed if no other type is declared.
	Xml	An XML value. Obtain the XML as a string using the GetValue method or Value property, or as an XmlReader by calling theCreateReader method.
	Udt	A SQL Server user-defined type (UDT).
	Structured	A special data type for specifying structured data contained in table-valued parameters.
	Date	Date data ranging in value from January 1,1 AD through December 31, 9999 AD.
	Time	Time data based on a 24-hour clock. Time value range is 00:00:00 through 23:59:59.9999999 with an accuracy of 100 nanoseconds. Corresponds to a SQL Server time value.
	DateTime2	Date and time data. Date value range is from January 1,1 AD through December 31, 9999 AD. Time value range is 00:00:00 through 23:59:59.9999999 with an accuracy of 100 nanoseconds.
	DateTimeOffset	Date and time data with time zone awareness. Date value range is from January 1,1 AD through December 31, 9999 AD. Time value range is 00:00:00 through 23:59:59.9999999 with an accuracy of 100 nanoseconds. Time zone value range is -14:00 through +14:00.

source : http://msdn.microsoft.com/en-us/library/system.data.sqldbtype.aspx