下表展示了所有支持的YashanDB 内部数据类型：

内部数据类型标识符	对应数据库数据类型
YAC_TYPE_BOOL	BOOL
YAC_TYPE_TINYINT	TINYINT
YAC_TYPE_SMALLINT	SMALLINT
YAC_TYPE_INTEGER	INTEGER
YAC_TYPE_BIGINT	BIGINT
YAC_TYPE_FLOAT	FLOAT
YAC_TYPE_DOUBLE	DOUBLE
YAC_TYPE_NUMBER	NUMBER
YAC_TYPE_DATE	DATE
YAC_TYPE_SHORTTIME	SHORTTIME
YAC_TYPE_TIMESTAMP	TIMESTAMP
YAC_TYPE_YM_INTERVAL	INTERVAL YEAR TO MONTH
YAC_TYPE_DS_INTERVAL	INTERVAL DAY TO SECOND
YAC_TYPE_CHAR	CHAR
YAC_TYPE_NCHAR	NCHAR
YAC_TYPE_VARCHAR	VARCHAR
YAC_TYPE_NVARCHAR	NVARCHAR
YAC_TYPE_BINARY	BINARY
YAC_TYPE_CLOB	CLOB
YAC_TYPE_BLOB	BLOB
YAC_TYPE_BIT	BIT
YAC_TYPE_ROWID	ROWID
YAC_TYPE_NCLOB	NCLOB
YAC_TYPE_JSON	JSON