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Function Reference

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TO_CHAR (Numbers)

Converts numeric values to text strings. TO_CHAR also converts dates to strings.

TO_CHAR converts numeric values to text strings as follows:

Converts double values to strings of up to 16 digits and provides accuracy up to 15 digits. If you pass a number with more than 15 digits, TO_CHAR rounds the number to the sixteenth digit.

Returns decimal notation for numbers in the ranges (-1e16,-1e-16] and [1e-16, 1e16). TO_CHAR returns scientific notation for numbers outside these ranges.

Data Integration

converts the values 1e-16 and -1e16 to scientific notation, but returns the values 1e-16 and -1e-16 in decimal notation.

Syntax

TO_CHAR( numeric_value )

Argument	Required/ Optional	Description
numeric_value	Required	Numeric datatype. The numeric value you want to convert to a string. You can enter any valid expression.

Return Value

String.

NULL if a value passed to the function is NULL.

Example

The following expression converts the values in the SALES column to text:

TO_CHAR( SALES )

SALES	RETURN VALUE
1010.99	'1010.99'
-15.62567	'-15.62567'
10842764968208837340	'1.084276496820884e+019' (rounded to 16th digit)
1.234567890123456789e-10	'0.0000000001234567890123457'(greater than 1e-16 but less than 1e16)
1.23456789012345e17	'1.23456789012345e17' (greater than 1e16)
0	'0'
33.15	'33.15'
NULL	NULL