My original point is that a statement like this: 
select a , b , c  from test 
   where (a = :var1 and b = :var2) 
      or (a = :var1 and c = :var3)

[download]
is equivalent to a statement like this: 
select a , b , c  from test 
   where  a = :var1 and ( b = :var2 or c = :var3 )

[download]

The difference isn't a matter of Perl experience; it's just that the latter query is simpler, easier to maintain, quicker to type, and maybe even faster on execution (if your DBMS isn't very good at optimizing queries). And you don't have to worry about whether you need to repeat a bind_param statement for a repeated value.

I honestly don't know whether you need to repeat bind_param when using the same variable more than once in a statment, because I use the simplest form of statement I can, always.

Anyway, I think the other answers about using the "?" place holder for bindings will be useful for you; note the following examples, which should both work, and yield the same result: 

$sth = $dbh->prepare("select a from b where (c=? and d=?) or (c=? and 
+f=?)");
$sth->execute( $cval, $dval, $cval, $fval );

[download]
or, more optimally: 
$sth = $dbh->prepare("select a from b where c=? and (d=? or f=?)");
$sth->execute( $cval, $dval, $fval );

[download]

(update fixed the prepare calls in the closing examples.)

In reply to Re: Re: bind_param - confusion ? by graff
in thread bind_param - confusion ? by premjhere

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