blocks|key|318573|text|由于您对保留任何数据不感兴趣，因此请使用drop+the+entire+database并创建一个新数据。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|318574|entityMap|0|LINK|mutability|MUTABLE|url|http://dev.mysql.com/doc/refman/5.0/en/drop-database.html^0|K|O|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Since you are not interested in keeping any data, <a href="http://dev.mysql.com/doc/refman/5.0/en/drop-database.html" rel="nofollow noreferrer">drop the entire database</a> and create a new one.

blocks|key|315756|text|如果你使用的是phpmyadmin，那么这个特性已经存在了。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|315757|315758|从表列表底部的下拉列表中选择要删除|unordered-list-item|315759|的表，选择drop|315760|将打开一个新页面，其底部将显示一个复选框，取消选中该复选框。|315761|通过接受“是”确认删除。|315762|315763|entityMap^0|7|A|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|W|8|@]|D|@]|E|$]]|$1|J|3|K|5|I|7|X|8|@]|D|@]|E|$]]|$1|L|3|M|5|I|7|Y|8|@]|D|@]|E|$]]|$1|N|3|O|5|I|7|Z|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|10|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|R|$]]

If you are using phpmyadmin then this feature is already there.

<ul>
<li>Select the tables you want to drop</li>
<li>From the dropdown at the bottom of tables list, select drop</li>
<li>A new page will be opened having checkbox at the bottom saying
"Foreign key check", uncheck it.</li>
<li>Confirm the deletion by accepting "yes".</li>
</ul>

blocks|key|3273690|text|您可以使用以下步骤，它对我的工作与约束删除表，解决方案已经解释在上面的评论，我只是为它添加屏幕截图-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3273691|📷|atomic|offset|length|3273692|​|3273693|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/a300fa5d93d9e278491893b84604ef0a.jpeg|imageAlt^0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@$E|T|F|U|1|V]]|A|$]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|J|$K|$5|L|M|N|A|$O|P|Q|-4]]]]

You can use the following steps, its worked for me to drop table with constraint,solution already explained in the above comment, i just added screen shot for that -<img src="https://i.stack.imgur.com/7xXAJ.jpg" alt="enter image description here">

blocks|key|3060298|text|Drop+database存在于所有版本的MySQL中。但是，如果您想保持表结构，这里有一个想法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3060299|mysqldump+--no-data+--add-drop-database+--add-drop-table+-hHOSTNAME+-uUSERNAME+-p+>+dump.sql|3060300|这是一个程序，不是mysql命令|3060301|然后，登录到mysql并|3060302|源dump.sql；|3060303|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Drop database exist in all versions of MySQL. But if you want to keep the table structure, here is an idea

mysqldump --no-data --add-drop-database --add-drop-table -hHOSTNAME -uUSERNAME -p > dump.sql

This is a program, not a mysql command

Then, log into mysql and 

source dump.sql;

blocks|key|3273722|text|一次从终端删除所有表的简单解决方案。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3273723|这涉及到mysql+shell中的几个步骤(尽管不是一个步骤的解决方案)，这对我很有效，也节省了我的一天。|3273724|适用于服务器版本:+5.6.38+MySQL社区服务器(GPL)|3273725|我遵循的步骤：|3273726|+1.+generate+drop+query+using+concat+and+group_concat.
+2.+use+database
+3.+turn+off+/+disable+foreign+key+constraint+check+(SET+FOREIGN_KEY_CHECKS+=+0;),+
+4.+copy+the+query+generated+from+step+1
+5.+re+enable+foreign+key+constraint+check+(SET+FOREIGN_KEY_CHECKS+=+1;)
+6.+run+show+table|code-block|syntax|javascript|3273727|MySQL外壳|3273728|$+mysql+-u+root+-p
Enter+password:+******+(your+mysql+root+password)
mysql>+SYSTEM+CLEAR;
mysql>+SELECT+CONCAT('DROP+TABLE+IF+EXISTS+`',+GROUP_CONCAT(table_name+SEPARATOR+'`,+`'),+'`;')+AS+dropquery+FROM+information_schema.tables+WHERE+table_schema+=+'emall_duplicate';
%2B------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------%2B
%7C+dropquery++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%7C
%2B------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------%2B
%7C+DROP+TABLE+IF+EXISTS+`admin`,+`app`,+`app_meta_settings`,+`commission`,+`commission_history`,+`coupon`,+`email_templates`,+`infopages`,+`invoice`,+`m_pc_xref`,+`member`,+`merchant`,+`message_templates`,+`mnotification`,+`mshipping_address`,+`notification`,+`order`,+`orderdetail`,+`pattributes`,+`pbrand`,+`pcategory`,+`permissions`,+`pfeatures`,+`pimage`,+`preport`,+`product`,+`product_review`,+`pspecification`,+`ptechnical_specification`,+`pwishlist`,+`role_perms`,+`roles`,+`settings`,+`test`,+`testanother`,+`user_perms`,+`user_roles`,+`users`,+`wishlist`;+%7C
%2B------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------%2B
1+row+in+set+(0.00+sec)

mysql>+USE+emall_duplicate;
Database+changed
mysql>+SET+FOREIGN_KEY_CHECKS+=+0;+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Query+OK,+0+rows+affected+(0.00+sec)

//+copy+and+paste+generated+query+from+step+1
mysql>+DROP+TABLE+IF+EXISTS+`admin`,+`app`,+`app_meta_settings`,+`commission`,+`commission_history`,+`coupon`,+`email_templates`,+`infopages`,+`invoice`,+`m_pc_xref`,+`member`,+`merchant`,+`message_templates`,+`mnotification`,+`mshipping_address`,+`notification`,+`order`,+`orderdetail`,+`pattributes`,+`pbrand`,+`pcategory`,+`permissions`,+`pfeatures`,+`pimage`,+`preport`,+`product`,+`product_review`,+`pspecification`,+`ptechnical_specification`,+`pwishlist`,+`role_perms`,+`roles`,+`settings`,+`test`,+`testanother`,+`user_perms`,+`user_roles`,+`users`,+`wishlist`;
Query+OK,+0+rows+affected+(0.18+sec)

mysql>+SET+FOREIGN_KEY_CHECKS+=+1;
Query+OK,+0+rows+affected+(0.00+sec)

mysql>+SHOW+tables;
Empty+set+(0.01+sec)

mysql>+|3273729|entityMap^0|0|I|0|0|0|W|0|4|3|0|0|0|7|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|L|3|M|5|N|7|16|8|@]|D|@]|E|$O|P]]|$1|Q|3|R|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|S|3|T|5|N|7|1A|8|@]|D|@]|E|$O|P]]|$1|U|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|V|$]]

Simple solution to drop all the table at once from terminal. 

This involved few steps inside your mysql shell (not a one step solution though), this worked me and saved my day.

Worked for Server version: 5.6.38 MySQL Community Server (GPL)

Steps I followed:

<pre><code> 1. generate drop query using concat and group_concat.
 2. use database
 3. turn off / disable foreign key constraint check (SET FOREIGN_KEY_CHECKS = 0;), 
 4. copy the query generated from step 1
 5. re enable foreign key constraint check (SET FOREIGN_KEY_CHECKS = 1;)
 6. run show table
</code></pre>

MySQL shell

<pre><code>$ mysql -u root -p
Enter password: ****** (your mysql root password)
mysql&gt; SYSTEM CLEAR;
mysql&gt; SELECT CONCAT('DROP TABLE IF EXISTS `', GROUP_CONCAT(table_name SEPARATOR '`, `'), '`;') AS dropquery FROM information_schema.tables WHERE table_schema = 'emall_duplicate';
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| dropquery |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| DROP TABLE IF EXISTS `admin`, `app`, `app_meta_settings`, `commission`, `commission_history`, `coupon`, `email_templates`, `infopages`, `invoice`, `m_pc_xref`, `member`, `merchant`, `message_templates`, `mnotification`, `mshipping_address`, `notification`, `order`, `orderdetail`, `pattributes`, `pbrand`, `pcategory`, `permissions`, `pfeatures`, `pimage`, `preport`, `product`, `product_review`, `pspecification`, `ptechnical_specification`, `pwishlist`, `role_perms`, `roles`, `settings`, `test`, `testanother`, `user_perms`, `user_roles`, `users`, `wishlist`; |
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql&gt; USE emall_duplicate;
Database changed
mysql&gt; SET FOREIGN_KEY_CHECKS = 0; Query OK, 0 rows affected (0.00 sec)

// copy and paste generated query from step 1
mysql&gt; DROP TABLE IF EXISTS `admin`, `app`, `app_meta_settings`, `commission`, `commission_history`, `coupon`, `email_templates`, `infopages`, `invoice`, `m_pc_xref`, `member`, `merchant`, `message_templates`, `mnotification`, `mshipping_address`, `notification`, `order`, `orderdetail`, `pattributes`, `pbrand`, `pcategory`, `permissions`, `pfeatures`, `pimage`, `preport`, `product`, `product_review`, `pspecification`, `ptechnical_specification`, `pwishlist`, `role_perms`, `roles`, `settings`, `test`, `testanother`, `user_perms`, `user_roles`, `users`, `wishlist`;
Query OK, 0 rows affected (0.18 sec)

mysql&gt; SET FOREIGN_KEY_CHECKS = 1;
Query OK, 0 rows affected (0.00 sec)

mysql&gt; SHOW tables;
Empty set (0.01 sec)

mysql&gt; 
</code></pre>

blocks|key|313625|text|Table1+{T_Id，T_Name，TT_Id(可为空)(+Table2上指向列TT_ID的外键)}|type|unstyled|depth|inlineStyleRanges|entityRanges|data|313626|Table2+{TT_ID，TT_Title}|313627|1-+make+the+foreign+Key+relation+null+able+on+the+table1
2-+update+table1+set+TT_ID+=+null+where+T_ID+=+?
3-+delete+from+table1|code-block|syntax|javascript|313628|现在，您可以删除table1数据而保留table2数据。|313629|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Table1 {T_Id, T_Name, TT_Id(Nullable)(Foreign key on Table2 to the column TT_ID)}
Table2 {TT_ID,TT_Title}
<pre><code>1- make the foreign Key relation null able on the table1
2- update table1 set TT_ID = null where T_ID = ?
3- delete from table1
</code></pre>
now you can have the table1 data delete and table2 data remain.

I'm trying to delete all tables from a database except one, and I end up having the following error:

<blockquote>
 Cannot delete or update a parent row: a foreign key constraint fails 
</blockquote>

Of course I could trial and error to see what those key constraints are and eventually delete all tables but I'd like to know if there is a fast way to force drop all tables (as I'll be able to re-insert those I don't want deleted).

Google aimed me at some site that suggested the following method:

<pre><code>mysql&gt; SET foreign_key_checks = 0;
mysql&gt; drop table ...
mysql&gt; SET foreign_key_checks = 1;
</code></pre>

Short answer is it didn't really do the trick since I ended up receiving the same error while I was able to delete some more tables. I've seen on Stack Overflow ways to get all foreign keys linked to a certain table but that's way too time consuming unless I script it all (which is doable in the case there is no other option)

Database is 4.1 so I can't use <code>DROP DATABASE</code>

Ideas?

Force drop mysql bypassing foreign key constraint

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我试图从数据库中删除除一个表之外的所有表，结果出现以下错误：无法删除或更新父行:外键约束失败当然，我可以反复尝试，看看这些键约束是什么，并最终删除所有表，但我想知道是否有一种快速的方法来强制删除所有表(因为我可以重新插入那些我不想删除的表)。谷歌针对我的一些网站，提出了以下方法：mysql> SET foreign_key_checks = 0;mysql> drop table ...mysql

问绕过外键约束强制删除mysql
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问绕过外键约束强制删除mysql
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