The main purpose of the table maintenance generator is to
Create/Change/Delete the table entries with out writing any
code. When ever we create table maintenance generator it
will generate a standard program.

Another important thing is when ever u change ur table
structure(Include/delete fields) don't forget to delete and
recreate the table maintenance. Because the structure of the
table was changed. If u try access Table maintenance
generator(SM30) after changing the structure then it will
through u a dump.