2 questions!

[Arthur Radulescu]

Hi!

I have 2 questions!

1.What is more eficient to keep some images into a table or to keep their names in the 
table and images separated in a directory?

2.How can I join to big tables and verify if there are any duplicates (i have tried 
just to view the data from those tables with something like "select data1,data2 from 
table1, table2  where table1.data1 != table2.data2"
... and MySQL is out of memory) ?