Round and Trunc with dates

Question

Can i get the examples for Round and Trunc with dates?

Answer 1

Hi Rahul,
Check out this workout by Tom Kyte on TRUNC and ROUND -
http://www.oracle.com/technetwork/issue-archive/2012/12-sep/o52sql-1735910.html
Dont skip even a single line of it. Really useful.
My little workout :
Ranit>> select
  2  round(123.444) r1,
  3  round(123.999) r2,
  4  trunc(123.444) t1,
  5  trunc(123.999) t2
  6  from
  7  dual;
        R1         R2         T1         T2                                                                                                                                                                                
       123        124        123        123                                                                                                                                                                                
Ranit>> select
  2  round(123.444,2) r1,
  3  round(123.999,2) r2,
  4  trunc(123.444,2) t1,
  5  trunc(123.999,2) t2
  6  from dual;
        R1         R2         T1         T2                                                                                                                                                                                
    123.44        124     123.44     123.99                                                                                                                                                                                
Ranit>> select
  2  round(123.1234,2) r1, -- "Rounds upto 2 Decimal places"
  3  round(123.1266,2) r2, -- "Rounds upto 2 Decimal places"
  4  trunc(123.1234,2) t1, -- "Keeps only 2 decimal places and Truncates the rest"
  5  trunc(123.1266,2) t2  -- "Keeps only 2 decimal places and Truncates the rest"
  6  from
  7  dual;
        R1         R2         T1         T2                                                                                                                                                                                
    123.12     123.13     123.12     123.12                                                                                                                                                                                
--"Note the difference in R2 andT2 values : In R2 there's a data round-off done but in T2 it is simple cut-off of extra decimal part"HTH
Edited by: ranit B on Jan 26, 2013 7:24 PM