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#!/usr/bin/perl

...
$sth->execute("$tut_id","$tut_title","$tut_author") || die $DBI::errst
+r;

$dbh->disconnect;

DBD::mysql::st execute failed: Column count doesn't match value count 
+at row 1 at db.pl line 18.

INSERT INTO `test` VALUES ('10','title','author')

#1136 - Column count doesn't match value count at row 1

ERROR 1136 (21S01): Column count doesn't match value count at row 1

ERROR 1136 (21S01): Column count doesn't match value count at row 1

$sth->execute($tut_id,$tut_title,$tut_author) || die $DBI::errstr;

$sth->execute("$tut_id","$tut_title","$tut_author") || die $DBI::errst
+r;