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> Ok, I trying to get this example... what is "table1 t1, table2 t2, 
> table3 t3, table4 t4", I mean, what does the t1, t2, t3, t4 represent?  
> If you say, table 1, table 2, etc.... well, I assume that, but isn't 
> that there already?

t1, t2 etc represents an alias for the table. If you have a long
tablename, you can give it a short alias, and then just use the short
alias in the rest of the query.

----
Peter Rønning

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