选择php中的查询不起作用

Question

$dateBegin=date( 'Y-m-d');
$dateEnd=date( 'Y-m-d');

// $sql = "SELECT smsno FROM SMSTRAN where smsdate BETWEEN '$dateBegin' AND '$dateEnd' ";

// $sql = "SELECT smsno FROM SMSTRAN WHERE STR_TO_DATE(smsdate,'Y-m-d') between STR_TO_DATE('$dateBegin','Y-m-d') and STR_TO_DATE('$dateEnd','Y-m-d') ";

$sql = "SELECT smsno FROM SMSTRAN WHERE smsdate BETWEEN '".$dateBegin." 00:00:00' AND '".$dateEnd." 23:59:59' ORDER BY smsno ";

我收到选择查询的语法错误，我尝试了不同的方法来检索记录，早期的sql语句被评论，都没有用？

Answer 1

当我在mysql表SMSTRAN中插入一条记录时，上次查询有效。之前在mysql表中没有数据，因此无法正常工作