I'm pretty sure I don't understand what you're asking. In general, the best way to "interpolate" values into an sql query is by using placeholders with DBI.
If you want this literal string of eight characters - $in{cid} - to be the value being tested in the where clause, you could do it like this:
my $dbh = DBI->connect( $whatever… )
...
my $sth = $dbh->prepare( "select field from table where id != ?" );
$sth->execute( '$in{cid}' ); # an 8-character string is the placehold
+er value
...
On the other hand, if
$in{cid} is an actual hash element in your script, and it happens to contain a string or number that you want to use as the value to be tested in the where clause, then:
my %in;
$in{cid} = "something";
my $dbh = DBI->connect( $whatever… )
...
my $sth = $dbh->prepare( "select field from table where id != ?" );
$sth->execute( $in{cid} ); # the hash element value is the placeholde
+r value
...
Did you have something in mind other than these two cases?
Sorry - I'll try to respond again, now that I understand the question.
