sql addition, deletion, modification PHP MySql addition, deletion, modification and query

mysql_connect() connects to the database

mysql_select_db selects the database

mysql_fetch_assoc() gets the result set

mysql_query() executes the sql statement

Examples are as follows:

$con=@mysql_connect('localhost','root','root');//Connect to the database
mysql_select_db('test',$con);//Select the database
$userInfo=mysql_query("select * from user ",$con);//Create sql statement
echo "

";while($row=mysql_fetch_assoc($userInfo))//Get the data of each row of the result set{echo " ";" row['username'];echo "";echo " ";echo "< ;/tr>";}echo "

"; echo $row['password']; echo "

";
mysql_free_result($userInfo);//Release the result set
mysql_close($con); //Close the database
/*delete
$d=@ mysql_connect('localhost','root','root');
mysql_select_db('test',$d);
mysql_query("delete from user where id=1",$d);
mysql_close($d);
*/
/*insert
$i=@mysql_connect('localhost','root','root');
mysql_select_db('test',$i);
mysql_query("insert into user(username,password) values('ad','ad')",$i);
mysql_close($i);
*/
//update
$u=@mysql_connect('localhost','root','root');
mysql_select_db('test',$u);
mysql_query("update user set username='aaa' where username='00'",$u);
echo "update user set username='ax' where id=2 ";
mysql_close($u);

?>


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