explain

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hi all!
PLEASE, CC TO ME DIRECTLY, since i'm not subscribed to this list.
where can i find information on what the data shown by 'explain <SQL
 statement>' command? and how to improve the performance of my db. through
understanding this data?
TIA!
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Norberto Meijome (a) Numard - PGP public key: pgp-numy@smartmedia.com.ar
It would be nice to be sure of anything the way some people are of
everything.


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