currently, to list the last 100 records in a table I use this sql command:

select * from test order by T desc  limit 100;
Note: "T" is the name of a field in my table "test" .

can I instead use record number or use the count function to get the same 
result?
I don't have an index field in my table and the table has no primary key 
for a good reason.

Also, is this command possible?

select count(*) from table1, table2;
if it is,  why can't I get the correct result:

table1 has 337 records and table2 has 23860 records but the result is 
8040820 instead.


thanks
--------------------
Nissim Lugasy
216-433-2708
[EMAIL PROTECTED]
--------------------


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