Multiple Key Columns in update function
What would be the most efficient method for having multiple Key Columns to identify which records to update?
The goal is to update records where:
Key Column 1 = Value 1 AND Key Column 2 = Value 2
EXAMPLE CODE WITH SINGLE KEY COLUMN (ID = $_SESSION['ID']):
<?php
// WA Application Builder Update
if ("" == "") // Trigger
{
$WA_connection = $upn_admin_connect;
$WA_table = "upn_admin_listing_upload";
$WA_redirectURL = "";
$WA_keepQueryString = false;
$WA_indexField = "ID";
$WA_fieldNamesStr = "property_status";
$WA_fieldValuesStr = "".$_SESSION['property_status'] ."";
$WA_columnTypesStr = "',none,''";
$WA_comparisonStr = "=";
$WA_fieldNames = explode("|", $WA_fieldNamesStr);
$WA_fieldValues = explode("|", $WA_fieldValuesStr);
$WA_columns = explode("|", $WA_columnTypesStr);
$WA_where_fieldValuesStr = "".$_SESSION['ID'] ."";
$WA_where_columnTypesStr = "',none,''";
$WA_where_comparisonStr = "=";
$WA_where_fieldNames = explode("|", $WA_indexField);
$WA_where_fieldValues = explode("|", $WA_where_fieldValuesStr);
$WA_where_columns = explode("|", $WA_where_columnTypesStr);
$WA_where_comparisons = explode("|", $WA_where_comparisonStr);
$WA_connectionDB = $database_upn_admin_connect;
mysql_select_db($WA_connectionDB, $WA_connection);
if (!session_id()) session_start();
$updateParamsObj = WA_AB_generateInsertParams($WA_fieldNames, $WA_columns, $WA_fieldValues, -1);
$WhereObj = WA_AB_generateWhereClause($WA_where_fieldNames, $WA_where_columns, $WA_where_fieldValues, $WA_where_comparisons );
$WA_Sql = "UPDATE `" . $WA_table . "` SET " . $updateParamsObj->WA_setValues . " WHERE " . $WhereObj->sqlWhereClause . "";
$MM_editCmd = mysql_query($WA_Sql, $WA_connection) or die(mysql_error());
if ($WA_redirectURL != "") {
if ($WA_keepQueryString && $WA_redirectURL != "" && isset($_SERVER["QUERY_STRING"]) && $_SERVER["QUERY_STRING"] !== "" && sizeof($_POST) > 0) {
$WA_redirectURL .= ((strpos($WA_redirectURL, '?') === false)?"?":"&").$_SERVER["QUERY_STRING"];
}
header("Location: ".$WA_redirectURL);
}
}
?>