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PHP MySQL ??

DELETE ?? ?????? ????? ?? ???? ? ?????.

??

DELETE FROM table_name

WHERE some_column = some_value

??: DELETE ??? WHERE ?? ?????. WHERE ?? ???? ?? ???? ?????. WHERE ?? ???? ?? ??? ?????!

SQL? ?? ??? ????? SQL ????? ?????.

?? ?

Myguests? ???? ?? ?????.

6.png

firstname='Mary' ???? ???????

<?php
 header("Content-type:text/html;charset=utf-8");    //設(shè)置編碼
 $con=mysqli_connect("localhost","root","root","test");
 // 檢測(cè)連接
 if (mysqli_connect_errno())
 {
     echo "連接失敗: " . mysqli_connect_error();
 }
 
 mysqli_query($con,"DELETE FROM Myguests WHERE firstname='Mary'");
 
 mysqli_close($con);
 ?>

???? ??:

2.png

???? ???? ?? ???????

???????

【?????】

1. ?? ? ??? where ??? ???? ???. ??? ??? ??? ??? ?????. .

2. ??? ???? ???? ?? ??? ??, ??, ??? ???.


???? ??
||
<?php header("Content-type:text/html;charset=utf-8"); //設(shè)置編碼 $con=mysqli_connect("localhost","root","root","test"); // 檢測(cè)連接 if (mysqli_connect_errno()) { echo "連接失敗: " . mysqli_connect_error(); } mysqli_query($con,"DELETE FROM Myguests WHERE firstname='Mary'"); mysqli_close($con); ?>