Implicit conversion between different data types

Implicit conversions between data types in assignment statements

Convert variable-length characters (varchar2) or fixed-length characters (char) to numeric types (NUMBER)

Convert variable-length characters (varchar2) or fixed-length characters (char) to date types (DATE)

Convert numeric (NUMBER) to variable-length character (varchar2)

Convert date type (DATE) to variable length character type (varchar2)

Implicit conversion of data types in expressions

Convert variable-length characters (varchar2) or fixed-length characters (char) to numeric types (NUMBER)

Convert variable-length characters (varchar2) or fixed-length characters (char) to date types (DATE)

Data of numeric type (NUMBER) and data of date type (DATE) cannot be converted directly. One of the data types must be converted to character type first, and then the character type must be converted to the other data type.