Amazon Redshift database supports the below Arithmetic functions:
- ABS
- FLOOR
- CEIL
- ROUND
- TRUNC
ABS function returns the absolute value of a number.
Examples:
SELECT ABS(-20); abs ----- 20
SELECT ABS(100-20); abs ----- 80
FLOOR function returns the rounded down whole number of an integer.
Example:
SELECT FLOOR(99.56); floor ------ 99
CEIL function returns the rounded up whole number of an integer.
Example:
SELECT CEIL(99.56); ceil ----- 100
ROUND function returns the nearest rounded value of an integer. You can specify the precision for rounding.
Example:
If you specify no precision, the integer is rounded to the nearest whole number.
SELECT ROUND(99.56); round ------ 100
If you specify the precision as 1, Integer is rounded to the first decimal place.
SELECT ROUND(99.56,1); round ------ 99.6
TRUNC function truncates the integer to the previous integer. You can specify precision with TRUNC function.
Examples:
SELECT TRUNC(99.56); trunc ------ 99
SELECT TRUNC(99.56,1); trunc ------- 99.5
