sequence no based on an input field

[Sandhyaa]

src Col	seq no
a	1
a	2
a	3
b	1
b	2
c	1

Based on one of the source columns, a sequence no  has to be generated. If the source value changes, then the sequene no must start from one.

Is this is possible in SAS DI without using user-written transformation?

[LinusH]

Not really, maybe by using some extensive logic using Group By and monotonic(), but that would probably be more difficult to understand, than a simple user written using by - first. logic.

[Jagadishkatam]

Hi Sandhyaa,

I am not sure if it is possible to get the seq no as you want in DI studio without coding. May be other members can you help you if they have come across similar situation.

Here is a small piece of code which i hope can help you

data have;

     input src_col $;

datalines;

a

a

a

b

b

c

;

proc sort data=want;

    by src_col;

run;

data want;

    set have;

    retain seq_no;

    by src_col;

    if first.src_col then seq_no=1;

    else seq_no+1;

run;

Thanks,

Jagadish