topic Re: Hash Programming in SAS Programming

Hash Programming

msbrvamsi — Thu, 21 Jan 2016 06:17:46 GMT

Hi ,
Please can someone help me with an example for
Left , inner , full join in Hash Coding
I have very large datasets nearly 1 crore so need help .

Reagrds,
Satya.

Re: Hash Programming

Kurt_Bremser — Thu, 21 Jan 2016 07:22:26 GMT

define "crore".

Re: Hash Programming

mohamed_zaki — Thu, 21 Jan 2016 07:22:42 GMT

Here you will find good Examples with explanation :

Merging into Hash: Some Practical Examples of Converting MERGE Statements into Hash Objects

Re: Hash Programming

msbrvamsi — Thu, 21 Jan 2016 07:25:00 GMT

Sorry it's 1 crore data please give some examples for all joins

Re: Hash Programming

mohamed_zaki — Thu, 21 Jan 2016 07:28:36 GMT

Ten million

Crore

Re: Hash Programming

mohamed_zaki — Thu, 21 Jan 2016 16:21:23 GMT

With such number you should keep in mind that, Larger data will require more memory and can impact overall system performance.

You may consider increase the HASHEXP value to maximize the efficiency of the hash object lookup. Read more here DECLARE Statement, Hash and Hash Iterator Objects . So increase it and see if you reach better performance.