异构关系数据库（Sqlserver与Oracle）之间的数据类型转换参考

一、Oracle到SqlServer的数据类型的转变

编号	Oracle	ToSqlServer	SqlServer
1	BINARY_DOUBLE	VARCHAR(100)	real
2	BINARY_FLOAT	VARCHAR(100)	float
3	BLOB	UNKNOWN	image
4	CHAR	VARCHAR(2)	nchar
5	DATE	UNKNOWN	date
6	INTERVAL_DAY_TO_SECOND	VARCHAR(100)	nvarchar
7	INTERVAL_YEAR_TO_MONTH	VARCHAR(100)	nvarchar
8	LONG	VARCHAR(100)	ntext
9	LONG RAW	VARCHAR(100)	image
10	NCLOB	TEXT	ntext
11	NUMBER	FLOAT(53)	Numeric
12	NVARCHAR2	VARCHAR(20)	nvarchar
13	RAW	VARCHAR(20)	varbinary
14	TIMESTAMP	UNKNOWN	timestamp
15	TIMESTAMP(6) WITH LOCAL TIME ZONE	VARCHAR(100)	datetime
16	TIMESTAMP(6) WITH TIME ZONE	VARCHAR(100)	datetime
17	CLOB	TEXT	TEXT

 二、SqlServer到Oracle的数据类型的转变

编号	SqlServer	ToOracle	Oracle
1	bigint	INTEGER	NUMBER
2	bit	CHAR(1)	NUMBER
3	char	VARCHAR2(10)	CHAR
4	date	VARCHAR2(10)	DATE
5	datetime2(7)	VARCHAR2(27)	TIMESTAMP
6	datetimeoffset(7)	VARCHAR2(34)	TIMESTAMP (7) WITH TIME ZONE
7	decimal(18, 0)	INTEGER	NUMBER
8	float	NUMBER	float
9	Int	INTEGER	NUMBER
10	nchar(10)	VARCHAR2(10)	NCHAR
11	ntext	CLOB	NCLOB
12	numeric(18, 0)	INTEGER	NUMBER
13	nvarchar(MAX)	CLOB	NCLOB
14	real	NUMBER	real
15	smallint	INTEGER	NUMBER
16	sql_variant	CLOB	NCLOB
17	xml	CLOB	NCLOB
18	uniqueidentifier	VARCHAR2(36)	CHAR
19	tinyint	INTEGER	NUMBER
20	smalldatetime	TIMESTAMP	DATE
21	smallint	INTEGER	NUMBER
22	Xml	CLOB	NCLOB
23	varchar(MAX)	CLOB	VARCHAR
24	geography	BLOB	BLOB
25	geometry	BLOB	BLOB
26	hierarchyid	BLOB	BLOB
27	binary(50)	BLOB	BLOB
28	Image	BLOB	BLOB
29	Int	INTEGER	INTEGER
30	money	NUMBER(19，4)	NUMBER(19，4)
31	nvarchar(50)	VARCHAR2(50)	VARCHAR2(50)
32	smallmoney	NUMBER(10, 4)	NUMBER(10, 4)
33	text	CLOB	CLOB
34	varbinary(50)	BLOB	BLOB
35	varbinary(MAX)	BLOB	BLOB
36	varchar(50)	VARCHAR	VARCHAR