Short DT_I2 6 Long DT_I4 11 Single DT_R4 24 Double DT_R8 24 Currency DT_CY 22 Bit DT_BOOL 10 Byte DT_UI1 3 GUID DT_GUID 39 BigBinary DT_BYTES LongBinary DT_IMAGE 255 VarBinary DT_BYTES LongText DT_NTEXT 255 VarChar DT_WSTR Decimal DT_NUMERIC 31 DateTime DT_DBTIMESTAMP 30