Oracle PL/SQL FLOOR function example

The FLOOR() function round the specified number down, and return the largest number that is less than or equal to the specified number.

FLOOR function examples

SELECT FLOOR(1.2) FROM DUAL; 		-- output : 1
SELECT FLOOR(1.5) FROM DUAL; 		-- output : 1
SELECT FLOOR(1.7) FROM DUAL; 		-- output : 1
SELECT FLOOR(1.99) FROM DUAL;		-- output : 1
SELECT FLOOR(-1.2) FROM DUAL; 		-- output : -2
SELECT FLOOR(-1.5) FROM DUAL; 		-- output : -2
SELECT FLOOR(-1.7) FROM DUAL; 		-- output : -2
SELECT FLOOR(-1.99) FROM DUAL; 		-- output : -2
SELECT FLOOR(20.9) FROM DUAL; 		-- output : 20
SELECT FLOOR(-5.1) FROM DUAL; 		-- output : -6
SELECT FLOOR(-100.01) FROM DUAL;	-- output : -101
SELECT FLOOR(1000.99) FROM DUAL;	-- output : 1000

References

1. FLOOR Function :- Oracle official docs