CHAPTER 11Conversion and Transformation Functions
This chapter looks at functions that convert, or transform, one datatype into another. Four major datatypes and their associated functions have been covered thus far:
CHAR (fixed-length character strings) and VARCHAR2 (variable-length character strings) include any letter of the alphabet, any number, and any of the symbols on the keyboard. Character literals must be enclosed in single quotation marks:'Sault Ste. Marie!'
NUMBER includes just the digits 0 through 9, a decimal point, and a minus ...
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