SSIS data types VS SQL Server data types

Many times we are in need of cross-references between SQL Server data types and the data types available with SQL Server Integration Services.

SSIS Data Type	SSIS Expression	SQL Server
single-byte signed integer	(DT_I1)
two-byte signed integer	(DT_I2)	smallint
four-byte signed integer	(DT_I4)	int
four-byte signed integer	(DT_I4)	int
eight-byte signed integer	(DT_I8)	bigint
eight-byte signed integer	(DT_I8)	bigint
float	(DT_R4)	real
double-precision float	(DT_R8)	float
string	(DT_STR, «length», «code_page»)	char, varchar
Unicode text stream	(DT_WSTR, «length»)	nchar, nvarchar, sql_variant, xml
date	(DT_DATE)	date
Boolean	(DT_BOOL)	bit
numeric	(DT_NUMERIC, «precision», «scale»)	decimal, numeric
decimal	(DT_DECIMAL, «scale»)	decimal
currency	(DT_CY)	smallmoney, money
unique identifier	(DT_GUID)	uniqueidentifier
byte stream	(DT_BYTES, «length»)	binary, varbinary, timestamp
database date	(DT_DBDATE)	date
database time	(DT_DBTIME)
database time with precision	(DT_DBTIME2, «scale»)	time(p)
database timestamp	(DT_DBTIMESTAMP)	datetime, smalldatetime
database timestamp with precision	(DT_DBTIMESTAMP2, «scale»)	datetime2
database timestamp with timezone	(DT_DBTIMESTAMPOFFSET, «scale»)	datetimeoffset(p)
file timestamp	(DT_FILETIME)
image	(DT_IMAGE)	image
text stream	(DT_TEXT, «code_page»)	text
Unicode string	(DT_NTEXT)	ntext