$sq4 ="select country, count(*) from employee where country ='usa'";
$result4 = mysqli_query($ db, $ sq4);
<?php echo mysqli_num_rows($result4);?>
这是代码,上面连接用的$ db 没错,mysql 和navicat 正常输出,正确的应该是6,php没报错,但输出的是1
$sq4 ="select country, count(*) from employee where country ='usa'";
$result4 = mysqli_query($ db, $ sq4);
<?php echo mysqli_num_rows($result4);?>
这是代码,上面连接用的$ db 没错,mysql 和navicat 正常输出,正确的应该是6,php没报错,但输出的是1