Oracle's Numer type corresponds to the c,c# data type

has recently been working on an Oracle database-related program.
The correspondence between the number type of Oracle and the C language, the C # language type, has been found on the network for a long time, and no explanatory text has been located.
But in http://oracle.chinaitlab.com/induction/734741.html there is a "Oracle and DB2 data type classification corresponding to the description," according to this article, I summarized the number type of Oracle and C language, C #语言类型的对应关系.

number, which is stored in decimal format, is easy to store, but in the calculation, it is automatically converted into binary operation. It is defined by number (p,s), P is precision, maximum 38 bits, S is the scale range, can be in-84 ... 127 values. For example: Number (5,2) can be used to store the representation-999.99 ... 999.99-room value. P, S can be omitted in the definition, for example: Number (5), number, etc.;

First of all, it must be declared that Oracle's number type and C language, C # language type of correspondence can not be completely one-to-one, the table below only as a general reference.

Oracle	db2/400	C	C#	c/c# Data range
Number	Float (n)/real/double	Double	Double	1.7E +/-308 (digits)
Number (p) P<=4	Samllint DECIMAL (P) Number (p)	Short	Int16	–32,768 to 32,767 Number (5)
Number (p) 5<=p<=9	INTEGER DECIMAL (P) Number (p)	Int	Int32	–2,147,483,648 to 2,147,483,647 Number (10)
Number (p) 10<=p<=19	BIGINT DECIMAL (P) Number (p)	__int64	Int64	–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 Number (19)
Number (P,s) P=7 s=3	Float (N) DECIMAL (P,s) Number (P,s)	Float	Float	3.4E +/-(7 digits)
Number (P,s) P=15 s=5	REAL DECIMAL (P,s) Number (P,s)	Double	Double	1.7E +/-308 (digits)
Number (P,s) P=15 s=5	DOUBLE DECIMAL (P,s) Number (P,s)	Double	Double	1.7E +/-308 (digits)

Oracle's Numer type corresponds to the c,c# data type