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在DBI-1.634使用手册里有一个selectrow_array函数，该函数具体说明如下：
This utility method combines "prepare", "execute" and "fetchrow_array" into a single call. If called in a list context, it returns the first row of data from the statement. The $statement parameter can be a previously prepared statement handle, in which case the prepare is skipped.
手册里说明该函数具备与fetchrow_array类似的功能。在实际使用时，确实有区别的。如下例子：
1 #!/bin/env perl 2 use DBI; 3 4 my $dbh=DBI->connect("dbi:Oracle:gzgldb","nrmdb","nrmoptr123") or die "connect db error!"; 5 6 my $sql=‘select * from router‘; 7 8 my $sth=$dbh->prepare($sql); 9 10 $sth->execute() or die "execute sql error!"; 11 12 my @row1=$sth->fetchrow_array(); 13 print "@row1 \n"; 14 @row1=$sth->fetchrow_array(); 15 print "@row1 num2 \n"; 16 17 my @row=$dbh->selectrow_array($sql); 18 print "@row\n"; 19 20 @row=$dbh->selectrow_array($sql); 21 22 print "@row\n"; 23 24 25 $sth->finish; 26 $dbh->disconnect();
以下为输出结果：
由此可以看出fetchrow_array每取一次，行指针会下移一次；而selectrow_array确不会这样做。
DBI-1.634之selectrow_array与fetchrow_array的区别
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原文地址：http://www.cnblogs.com/sorliran/p/4737002.html
