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Sams Teach Yourself MySQL in 21 Days, Second Edition
book

Sams Teach Yourself MySQL in 21 Days, Second Edition

by Tony Butcher
December 2002
Beginner content levelBeginner
640 pages
16h 41m
English
Sams
Content preview from Sams Teach Yourself MySQL in 21 Days, Second Edition

Basics of Database Queries

Now that you've mastered creating a Perl script and connecting to and disconnecting from your database, you're ready to do some simple database queries.

Running Queries That Return a Resultset

DBI has a number of methods (shown in Table 12.1) that help you handle a query that returns a resultset.

Table 12.1 shows the methods for running queries, which you will learn how to use.

Table 12.1. DBI Methods for Running Queries
DBI MethodMeaning
$sth = $dbh->prepare ($statement);Prepare query
$rv = $sth->execute ();Execute query
$rv = $dbh->do ($statement);Prepare and execute query, and finish
$rv = $dbh->do ($statement, %attr);Prepare and execute query, and finish (with extra attributes)

Running Queries with prepare() and execute() ...

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Publisher Resources

ISBN: 0672323923Purchase book