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S:select abs(-1) value
O:select abs(-1)  value from dual
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S:select ceiling(-1.001) value  
O:select ceil(-1.001)  value from dual
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S:select floor(-1.001) value  
O:select floor(-1.001)  value from dual
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S:select cast(-1.002 as int)  value  
O:select trunc(-1.002) value from dual 
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S:select round(1.23456,4) value    1.23460
O:select round(1.23456,4) value from dual 1.2346
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S:select Exp(1) value      2.7182818284590451   
O:select Exp(1) value from dual   2.71828182
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S:select log(2.7182818284590451) value     1
O:select ln(2.7182818284590451) value from dual;  1
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S:select log10(10) value       1
O:select log(10,10) value from dual;    1
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S:select SQUARE(4) value   16
O:select power(4,2) value from dual  16
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S:select SQRT(4) value    2
O:select SQRT(4) value from dual  2
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S:select power(3,4) value      81
O:select power(3,4) value from dual  81
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S:select rand() value 
O:select sys.dbms_random.value(0,1) value from dual;
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S:select sign(-8) value    -1
O:select sign(-8) value from dual  -1
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S:SELECT PI() value  3.1415926535897931
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S:select max(value) value from
 (select 1 value
 union
 select -2 value
 union
 select 4 value
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