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Friday, 1 April 2016

SQL-log

 This is based on 10 based logarithm.

    Syntax: log (10, value)   -- here value must be greater than zero which is positive only.     

    Ex:
          SQL> select log(10,100), log(10,2), log(10,1), log(10,null) from dual;

LOG(10,100)  LOG(10,2)  LOG(10,1) LOG(10,NULL)
---------------     -----------     ------------  -----------------
                             2            .301029996          0

LN (value) = LOG (EXP(1), value)

SQL> select  ln(3), log(exp(1),3) from dual;

                        LN(3)      LOG(EXP(1),3)
                         -------      -----------------
                     1.09861229    1.09861229


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2 comments:

  1. Szia,


    What you’re saying is absolutely correct SQL-log, but this isn’t the exact situation everywhere. Where most smart folk work on a project - why can’t you do this the Boss asks :).

    I would much appreciate to get a sample of data travelling via these steps.

    Source data to Staging server(tables) then PLSQL for data cleansing and transferring them to tbl_cleanABC or tbl_error_ABC. Checking the accuracy of data and finally PLSQL for loading to data warehouse.

    Follow my new blog if you interested in just tag along me in any social media platforms!


    Gracias
    Radhey

    ReplyDelete
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