https://docs.oracle.com/en/database/oracle/oracle-data-access-components/19.3/odpnt/ODPEFCore.html#GUID-80B07B35-46C9-408F-A688-F98CE1A4CD6C
NUMBER(1)
bool
System.Boolean
NUMBER(2)自NUMBER(4)
NUMBER(2)
NUMBER(4)
byte
System.Byte
NUMBER(5)
short/int16
System.Int16
NUMBER(6)自NUMBER(10)
NUMBER(6)
NUMBER(10)
int/int32
System.Int32
NUMBER(11)自NUMBER(19)
NUMBER(11)
NUMBER(19)
long/int64
System.Int64
NUMBER(>19)
decimal
System.Decimal
NUMBER(p,s)
NUMBER
BINARY_FLOAT
float
System.Float
BINARY_DOUBLE
double
System.Double
TIMESTAMP
DateTime
System.DateTime
DATE
Date
System.Date
INTERVAL DAY TO SECOND
TimeSpan
System.TimeSpan
INTERVAL YEAR TO MONTH
string
System.String
VARCHAR2
NVARCHAR2
CHAR
NCHAR
CLOB
NCLOB
RAW
byte[]
System.Byte[]
BLOB
XMLTYPE
ROWID
UROWID
LONG
BFILE
LONG RAW