Slightly OT, but

It is rather easy to recognize a start of an SQL-Statement

select max(prod_id)
from product
where effdt = (select max(effdt) from product)
[download]

insert order (prod_id, prod_cnt)
select prod_id, count(*)
from product
group by prod_id
[download]

The point is not to underestimate the tasks that faces the OP. Trying to make it work by just matching keywords gets the wrong answer against normal, everyday SQL very easily. SQL has a definite grammar that's precise, but it's not easy to parse thru. Additional difficulty comes from recognizing all the vendor-specific extensions to the language, but let's not go into that. :-)