Data Type
SQL Server (SqlClient)
Oracle (OracleClient)
DT_BOOL
bit
DT_BYTES
binary, varbinary, timestamp
raw
DT_CY
smallmoney, money
DT_DATE
date
DT_DBDATE
date
DT_DBTIME
DT_DBTIMESTAMP
datetime, smalldatetime
timestamp, date, interval
DT_DECIMAL
decimal
DT_FILETIME
DT_GUID
uniqueidentifier
DT_I1
DT_I2
smallint
DT_I4
int
DT_I8
bigint
DT_NUMERIC
decimal, numeric
number, int
DT_R4
real
DT_R8
float
float, real
DT_STR
char, varchar
DT_UI1
tinyint
DT_UI2
DT_UI4
DT_UI8
DT_WSTR
char, varchar, nchar, nvarchar, sql_variant, xml
char, rowid, varchar2, nvarchar2, nchar
DT_IMAGE
image
long raw, blob,loblocator, bfile, vargraphic, long vargraphic, user-defined
DT_NTEXT
text, ntext
long, clob, nclob, nvarchar, text
DT_TEXT
text

