Oracle Double and Float,number

Float,double,number are both numeric types of Oracle.
1 man = 2 english = 2 bytes

Double indicates that the dual-precision floating-point number occupies 8 bytes in the machine and is described with a 64-bit binary.

1. When there is only one parameter, such as number (24). Represents the maximum number of defined digits that can be set to 24-bit integers.
2, there are two parameters, such as number (38, 3). Indicates that the maximum number defined is 38 bits long, which contains 3 decimal places. That is, this type can be set to a maximum of 35-bit integers and 3 decimal digits.

Oracle Double and Float,number