Select/Where?

I need to retrieve a piece of data and believe I need to use the Select/Where or the "IN" statement, however I'm not well versed in either and not sure of the proper syntax.  I'm building a report that is currently generated via a PHP website with code forming an array.  I'm hoping I can simplify the code using just the bit below.

Thanks in advance!

What I need is the 'oldest' {SalesOrderDeliveries.omdDeliveryDate} where {SalesOrderDeliveries.omdSalesOrderID} = {@JobIdTrimmed}, and {SalesOrderDeliveries.omdShippedComplete} = 0

Here is all the existing code from the PHP website.  Seems like a bit much...

            $soarray=array();

            $sojarray=array();

            foreach($newarray as $key=>$value){

                foreach($newarray[$key] as $jid=>$gap){

                    $dod="";

        $closecount=0;

        $shipcompletecount=0;

        $earliestdate="";

        $earliestudate=0;

        $linecounts=0;

        $quantitycount=0;

        $shipcount=0;

        $dlstring="";

        $soid=0;                   

                    $results = dbc(DB_ERPALIAS,"SELECT","SalesOrderJobLinks","omjJobID='$jid' ORDER BY omjJobID ASC");

                    $j=0;

                    while($row=odbc_fetch_array($results)){

                        $soid = trim($row['omjSalesOrderID']);

                        $solid=trim($row['omjSalesOrderLineID']);

                        $jobid=trim($row['omjJobID']);

                        $sojarray[$jid][$soid]['LINES'][$solid]="";

                        $j++;

                    }

        $results = dbc(DB_ERPALIAS,"SELECT","SalesOrderDeliveries","omdSalesOrderID='$soid'");

        while($row=odbc_fetch_array($results)){

            $linecounts++;

            $shipstring="";

            $solid=trim($row['omdSalesOrderLineID']);

            $sodlid=trim($row['omdSalesOrderDeliveryID']);

            $sodldate=trim($row['omdDeliveryDate']);

            $sodldate=str_replace(" 00:00:00.000","",$sodldate);

            $sodldateunix=strtotime($sodldate);

            $sodlquantity=$row['omdQuantityShipped'];

            $quantitycount=$quantitycount+$sodlquantity;

            $sodlshipcomplete = $row['omdShippedComplete'];

            if($sodlshipcomplete==-1){

                $shipcompletecount++;

                $shipcount=$shipcount+$sodlquantity;

                $tempsodlq=str_replace(".00000","",$sodlquantity);

                $shipstring="(S:$tempsodlq)";

            }else{

                $shipstring="(NS)";

            }

            $sodlclosed=$row['omdClosed'];

            if($sodlclosed==-1){

                $closecount++;

            }

            $soarray[$soid]['DLINES'][$solid][$sodlid]['DATE']=$sodldate;

            $soarray[$soid]['DLINES'][$solid][$sodlid]['UDATE']=$sodldateunix;

            $soarray[$soid]['DLINES'][$solid][$sodlid]['QTY']=$sodlquantity;

            $soarray[$soid]['DLINES'][$solid][$sodlid]['SHIPPED']=$sodlshipcomplete;

            $soarray[$soid]['DLINES'][$solid][$sodlid]['CLOSE']=$sodlclosed;

            $dlstring=$dlstring."[$solid:$sodlid]$sodldate$shipstring | ";

            if($earliestdate==""){

                if($sodlshipcomplete==0){

                    $earliestdate=$sodldate;

                    $earliestudate=$sodldateunix;

                }

            }else{

                if($sodldateunix<$earliestudate){

                    if($sodlshipcomplete==0){

                        $earliestdate=$sodldate;

                        $earliestudate=$sodldateunix;

                    }

                }

            }

        }

        $soarray[$soid]['Stats']['DLINES']=$linecounts;

        $soarray[$soid]['Stats']['DLSHIPPED']=$shipcompletecount;

        $shipcount=round($shipcount);

        $soarray[$soid]['Stats']['DLSHIPQTY']=intval($shipcount);

        $soarray[$soid]['Stats']['DLSTRING']=$dlstring;

        $tempgetoqty=$soarray[$sid]['Stats']['OQTY'];

        $nogaps=0;

        if($shipcount<$tempgetoqty){

            $nogaps=1;

        }

        if($earliestdate!=""){

            $dod = $earliestdate;

            $soarray[$soid]['Stats']['DLEARLIEST']=$earliestdate;

            $soarray[$soid]['Stats']['DLEARLIESTU']=$earliestudate;

        }else{

            if($nogaps==0){

                $dod = "All Shipped";

                $soarray[$soid]['Stats']['DLEARLIEST']="All Shipped";

            }else{

                $dod = "Diff. in Qty";

                $soarray[$soid]['Stats']['DLEARLIEST']="Diff. in Qty";

            }

            $soarray[$soid]['Stats']['DLEARLIESTU']=time();

        }