You have use warnings; and perl -w, both activate warnings.

But the effects of use warnings; and perl -w are slightly different, this is explained in detail in warnings. Rule of thumb: perl -w enables warnings globally (bad), whereas use warnings; enables warnings only per file or block (good).

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^3: select from mysql table based on two column match by afoken
in thread select from mysql table based on two column match by abner

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