PHP? ???? MySQL ????? ?? ???? ?? ?? ??
HTML? ??? MySQL ??? ?? ?? ??? ????? ????? ?? ??? ??? ? ????.
- MySQL ??? ??: ??? ?? ??? ???? ??? ????? ???? ?????.
<code class="php">$contacts = mysql_query(" SELECT * FROM contacts ORDER BY ID ASC") or die(mysql_error());</code>
- ?? ??? ?? ??? ??: ???? ??? ???? ???? ??? ?? ?? ??? ?????.
<code class="php"><table id="contact-list"> <thead> <tr> <th>Name</th> <th>Email</th> <th>Telephone</th> <th>Address</th> <th>Delete</th> </tr> </thead> <tbody> //Iterate results and display data <?php while( $contact = mysql_fetch_array($contacts) ) : ?> <tr> <td><?php echo $contact['name']; ?></td> <td><?php echo $contact['email']; ?></td> <td><?php echo $contact['telephone']; ?></td> <td><?php echo $contact['address']; ?></td> <td> <form action='delete.php' method="post"> <input type="hidden" name="name" value="<?php echo $contact['name']; ?>"> <input type="submit" name="submit" value="Delete"> </form> </td> </tr> <?php endwhile; ?> </tbody> </table></code>
- ?? ???? ??: delete.php?? ??? ??? ??:
<code class="php">$query = "DELETE FROM contacts WHERE name={$_POST['name']} LIMIT 1"; // Execute the query to delete the record mysql_query ($query); // Handle success/failure scenarios if (mysql_affected_rows() == 1) { // Success: Contact deleted echo "<strong>Contact Has Been Deleted</strong><br /><br />"; } else { // Failure: Deletion failed echo "<strong>Deletion Failed</strong><br /><br />"; } </code>
- ?? ? ??: HTML ????? ?? ??? ??? ???? delete.php ????? ?? ?? ????? URL? ?????:
<code class="php"><form action='delete.php?name="<?php echo $contact['name']; ?>"' method="post"> <input type="hidden" name="name" value="<?php echo $contact['name']; ?>"> <input type="submit" name="submit" value="Delete"> </form></code>
? ??? PHP? ???? MySQL ????? ?? ???? ?? ?? ??? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

? AI ??

Undress AI Tool
??? ???? ??

Undresser.AI Undress
???? ?? ??? ??? ?? AI ?? ?

AI Clothes Remover
???? ?? ???? ??? AI ?????.

Clothoff.io
AI ? ???

Video Face Swap
??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

?? ??

??? ??

???++7.3.1
???? ?? ?? ?? ???

SublimeText3 ??? ??
??? ??, ???? ?? ????.

???? 13.0.1 ???
??? PHP ?? ?? ??

???? CS6
??? ? ?? ??

SublimeText3 Mac ??
? ??? ?? ?? ?????(SublimeText3)

TOSECIBERYNECTTOEREMOTEMYSQLSERVER, USESSHTUNNENG, CONFIGUREMYSQLFORREMOTEACCESS, SETFIREWALLRULES ? CONSIDERSSLENCRYPTION .First, SpectionANSSHTUNNELWITHSSH-L3307 : LocalHost : 3306user@remote-Server-NandConnectViamySQL-H127.0.1-P3307.second, editmys

MySQL ??? ?? ??? ?? ?? ??? ?? ??? ??????. 1. ?? ?? ?? ?? ???? Slow_Query_Log ? Long_Query_Time; 2. ???? ??? ?? ??? ???? ? ????? query_time, lock_time, rows_examined? ?? ?? ??? ???? ????. 3. ??? ????? ???? ?? mysqldumpslow ?? pt-query idigest ??? ??????. 4. ??? ???? ??? ??, ??*???*, ??? ?? ?? ?? ?????. ?? ??, user_id? ???? ???? ?? ? ?? ?? ?? ??? ?? ???? ???? ? ????.

MySQLDump? MySQL ??????? ??? ??? ???? ???? ?????. ??????? ???? ?? ?? ? ?? ?? ???? SQL ??? ?????. 1. ?? ??? ????? ??? ?????? ??? ???? ??? SQL ???? ?????. 2. ??? ?????? ?? ??? ??? ???? TB ?? ???? ?? ???? ???? ????. 3. ???? ???-single transaction,-databases,-all-databases,-routines ?; 4. MySQL ??? ???? ?? ?? ?? ?? ?? ? ??? ?? ??? ???? ? ????. 5. ??? ????? ????? ?? ? ?? ??? ???? ?? ????.

MySQL?? NULL ?? ?? ? ? 1. ???? ?? ? ? ? ??? NotNull? ???? ?? ??? NULL? ?????. 2. iSnull ?? ISNOTNULL = ??! =; 3. Ifnull ?? Coalesce ??? ????? ???? ???? ? ??? ? ????. 4. ?? ?? ????? NULL ?? ?? ??? ?? ???? ??? ?? ? ORM ??? ?? ?? ?????? ??????. NULL? ???? ?? ?? ???? ??? ???? ?? ?? ?? ????. ??? ???? ??, ?? ? ???? ?? ? ??? ?? ??? ??? ?? ???????. ??? ??? ???? ??? ?? ?? ??? ????? ?? ? ????.

MySQL ?????? ? ???? ??? ??? information_schema? ?? ????? ?? ? ??? ??? ? ????. 1. ?? ?????? ?? ?? : SQL ?? ???? selecttable_schemaas'database ', sum (data_length index_length)/1024/1024as'size (mb) 'frominformation_schema.tablessgroupbytable_schema; ?? ??????? ? ??? ??? ?? ??????? ???? ??? ?? ? ? ????. 2. ?? ??? ??? ?????? : selectta? ??????

?? ?? ? ?? ?? ??? ??? ??? ?????? ?? ??? ??? ?????? ??? ?????? ?????? ??? ?????. ? ?? ?? ???? ????. ??, ??????, ??? ? ??? ?? ??? UTF8MB4? ???? ???? ShowCreatedAtabase/Table? ???? ? Alter ??? ??????. ??, ?????? ??? ? UTF8MB4 ?? ??? ???? ?? ?? ??? ????? SetNames? ??????. ??, ?? ??? ????? ???? UTF8MB4_UNICODE_CI? ???? ?? ? ????? ???? ???? ?????? ???? ?? ? ? ?? ?? ??? ????? ??????.

GroupBy? ???? ???? ????? ?? ??? ???? ? ???? ??? ? ??? ????? ? ?????. ?? ??, GroupByCustomer_ID? ???? ? ??? ? ???? ??? ? ????. ???? ? 1,000 ? ??? ? ??? ??? ?? ? ? ????. ?? ? ? ?? ??? GroupBy? ??????, ?? ?? ?? ???? ???? ??? ??? ? ? ????. ???? ???? ? ??? ? ??, ?? ?? ??? ? ?? ???? ???? ?????.

MySQL? ???? ??? ???? InnoDB ?? ??? ???? ??? ???? ???? ?????. 1. ????? ??? SQL ?? ????, ?? ?? ?? ?? ??? ?????. 2. ? ???? ???, ???, ?? ? ???? ?????. 3. ????? ???? ????? ??? STARTTRANSACTION, CONMING ? ROLLBACK???. 4. 4 ?? ?? ???? ?? ??, ?? ? ??, ?? ??? ?? ? ???? ?????. 5. ????? ???? ???? ?? ??? ??? ?? ??? ?? ?? ? ??? ????? ??????. ??? ????? ?? MySQL? ?? ???? ?? ??? ?? ? ? ????.
