topic Re: edit checks in SAS Procedures

edit checks

rakeshvvv — Thu, 19 Nov 2015 15:48:29 GMT

Hi,

I have dataset with four variables…..id, etcd ,stdtc, endtc

14615100010001 SCRN 2014-07-31 2014-08-05

14615100010001 COMB 2014-08-05 2014-11-13

14615100010001 1000394 2014-11-14 2014-11-17

14615100010001 SAFFU 2014-11-26 2014-12-23

14615100010001 SURVFU 2014-12-24 2015-04-28

14615100010003 SCRN 2015-02-19 2015-02-25

14615100010003 COMB 2015-02-25 2015-07-02

14615100010003 1000394 2015-07-03 2015-07-06

14615100010003 SURVFU 2015-08-12 2015-08-14

I want to write a query in such a way that I want to output the following

For every id, The difference between the ENDTC and STDTC of next record should not be greater then1.

If the difference in greater then 1, we should output those. Those highlighted in yellow are discrepancies and we should output those.

Can someone help on this….

Re: edit checks

LinusH — Thu, 19 Nov 2015 15:51:27 GMT

Use a data step w/ BY and RETAIN . An potentially the use of first. and last. logic.

Re: edit checks

RW9 — Thu, 19 Nov 2015 15:55:27 GMT

Use lag function:

data check;
  set have;
  if lag(enddtc) - stdtc ne 1 then flag="Y";
run;

Re: edit checks

Reeza — Thu, 19 Nov 2015 16:18:58 GMT

Because you want both records you need a look forward method. There are many ways to do this.
One way is to add a record indicator for each row and then use a sql merge to join with the record +1. Then you can create a flag to keep certain records. This is a well written topic though, so either searching on here or lexjansen.com should provide some good look ahead methods.