how to create group wise sequence number and subgroup wise sequence number

[thanikondharish]

data rawdata ;
input subject date:date9. ;
format date date9. ;
cards;
101 01jan2023
101 01jan2023
101 02jan2023
101 03jan2023
101 03jan2023
101 03jan2023
run;

I have one dataset main group variable is subject and subgroup variable is date . Now how to create group wise sequence number and subgroup wise sequence number in datastep block as well as in proc sql .
Output should be like below:
for example:

subject    date              grp_seq_num         sub_grp_seq_num
101     01jan2023              1                                  1
101     01jan2023               1                                 2
101     02jan2023              1                                   1
101     03jan2023              1                                   1
101     03jan2023               1                                  2
101     03jan2023               1                                   3

102     05jan2023             2                                     1

102     05jan2023             2                                      2

102     06jan2023             2                                      1

[Patrick]

"... in datastep block as well as in proc sql"

Why are you asking for explicit and multiple coding approaches? If this is some sort of exercise then I suggest you first put in some own work and then share eventually not yet working code and ask questions based on what you already worked out and what's still missing. 

[Kurt_Bremser]

In a data step, it's a breeze. Forget SQL, SQL is not good for sequential operations.

Use a DATA step with BY subject date;

RETAIN both new variables.

At first.subject, increment grp_seq_num.

At first.date, set sub_grp_seq_num to 1, otherwise increment it.

Use Sum Statements to increment.