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Re: Number of elements in array

by NetWallah (Canon)
on Sep 24, 2012 at 13:55 UTC ( #995388=note: print w/replies, xml ) Need Help??

in reply to Number of elements in array

If you want to get the number of rows in a database table, the most efficient way would be to let the database count them:
...prepare ("Select COUNT(*) FROM TABLE_OR_QUERY"); # TABLE_OR_QUERY can be another (SELECT...) statement
Most databases will optimize queries, so you can do the count query, then do the data query as 2 separate queries.

             I hope life isn't a big joke, because I don't get it.

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Re^2: Number of elements in array
by tobyink (Abbot) on Sep 24, 2012 at 14:03 UTC

    This counts the number of rows. The OP was counting the number of columns.

    Of course, it's possible that the OP did actually want the number of rows...

    perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

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