Proc SQL

[c4shiva]

Hi All, 

Can  pls explain the below code. My doubt is 

1. var.sec_terc --> is this a table or column name?

2.from DET_CT var  --> What it is actually? If table, above one is column name is it?

proc sql;
create table CT_M. as select
var.sec_terc
,max (case when (var.mod_r in ('01') and var.CAL IN ('P') and FEC_COR_R BETWEEN intnx('month', "&PAR_FEC_H"d, -2, 'end') 
AND intnx('month', "&PAR_FEC_H"d, -4, 'begin') and var.edad_m_r>=0) then min(12,var.edad_m_r) else . end) as C_150

from DET_CT var 
where var.CALIDAD IN ('P' 'C' 'S' 'A')
and var.ESTADO_R not in ('7' '07' ' 7' '7 ' '70')
group by var.sec_terc;
quit;

[RW9]

I really suggest you look up some SQL help as this is pretty basic.

https://www.w3schools.com/sql/

Point 2 first.  

from det_ct var

What this does is it tells the compiler to take data from dataset det_ct, which is by default in the work library as no library specified, and assign to this data the alias var.  Therefore to refer to any variables from this dataset I use the alias var.

Point 1.

var.sec_terc

This leads on from the above point, where an alias var has been created to refer to the det_ct dataset.  It is effectively saying the variable from det_ct which is referenced by alias var.

[c4shiva]

Thank you so much ... now am clear... Am a fresher just started to learn SAS from google. Thanks again for your link.. very helpful.