下面代码是查询数据表tb_book中记录的部分代码,请将下面的语句补充完整。 mysqli_query($conn,"set names utf8"); $result=mysqli_query($conn, ____); while($myrow=____){ echo $myrow[2]."<br />"; }
时间: 2024-02-28 17:53:23 浏览: 87
可以使用以下语句查询数据表tb_book中记录:
```mysqli_query($conn, "SELECT * FROM tb_book");```
补充完整的代码如下:
```
mysqli_query($conn, "set names utf8");
$result = mysqli_query($conn, "SELECT * FROM tb_book");
while($myrow = mysqli_fetch_array($result)){
echo $myrow[2]."<br />";
}
```
相关问题
下面代码是删除数据表tb_book中记录的部分代码,请将下面的语句补充完整。$con
n = mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql = "DELETE FROM tb_book WHERE book_id=1";
if (mysqli_query($conn, $sql)) {
echo "Record deleted successfully";
} else {
echo "Error deleting record: " . mysqli_error($conn);
}
mysqli_close($conn);
查询数据表中前4条记录,数据表的主键为id,请将下面的查询语句补充完整。 mysqli_query($conn,"select * from tb_user ");
可以使用以下查询语句查询数据表tb_user中前4条记录:
```
mysqli_query($conn,"select * from tb_user limit 4");
```
其中,$conn是数据库连接对象;limit 4表示限制查询结果只返回前4条记录。
将代码中的空格替换为以上查询语句即可。
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