Comments by chander rani (Top 5 by date)

yes i am doing thanks...

i want to know the meaning of this query, like this query is generating a invoice number but i am getting null value, Why??

I dont understand this, Pls help me with another example.

yes like in one category table there is 2 categories cat1 and cat2, and under the cat1 there is subcat1 and subcat2 and like this also for cat2, under the cat2 there is subcat1 and subcat2.
this is binary format to store the data in single table, we have to implement the parent and
child relationship in one single table itself.