select CEIL(2.45);
select ceiling(1.5);
select floor(1.3);
select ABS(-8);
select EXP(1);
select pi();
select RAND(2) ,RAND(3);
select ROUND(5.9);
select SIGN(10);
select SIGN(0);
select SIGN(-10);
select SQRT(16);
select TRUNCATE(1.2345,3);
select 10 DIV 2 ;
select GREATEST(value1,value2,...)