查證後…用字串的日期比對，會比用 BETWEEN…AND 語法，來得有效率

例如…

$sqlCondition .= "AND a.publishDate >= ‘" . sqlStr($beginDate) . " 00:00:00′ ";
$sqlCondition .= "AND a.publishDate < ‘" . sqlStr($endDate) . " 00:00:00′ ";

V.S.

$sqlCondition .= "AND (a.publishDate BETWEEN ‘" . sqlStr($beginDate) . " 00:00:00′ AND ‘" . sqlStr($endDate) . " 00:00:00′) ";