我使用以下MSSQL服务器:

if (DB_NAME() = 'YOUR_DATABASE') 
begin
    while(exists(select 1 from INFORMATION_SCHEMA.TABLE_CONSTRAINTS where CONSTRAINT_TYPE='FOREIGN KEY'))
    begin
         declare @sql nvarchar(2000)
         SELECT TOP 1 @sql=('ALTER TABLE ' + TABLE_SCHEMA + '.[' + TABLE_NAME + '] DROP CONSTRAINT [' + CONSTRAINT_NAME + ']')
         FROM information_schema.table_constraints
         WHERE CONSTRAINT_TYPE = 'FOREIGN KEY'
         exec (@sql)
         PRINT @sql
    end

    while(exists(select 1 from INFORMATION_SCHEMA.TABLES))
    begin
         declare @sql2 nvarchar(2000)
         SELECT TOP 1 @sql2=('DROP TABLE ' + TABLE_SCHEMA + '.[' + TABLE_NAME + ']')
         FROM INFORMATION_SCHEMA.TABLES
        exec (@sql2)
        PRINT @sql2
    end
end
else
    print('Only run this script on the development server!!!!')

用数据库的名称替换YOUR_DATABASE或删除整个IF语句(我喜欢增加的安全性)。

从http://www.devdaily.com/blog/post/mysql/drop-mysql-tables-in-any-order-foreign-keys:

SET FOREIGN_KEY_CHECKS = 0;
drop table if exists customers;
drop table if exists orders;
drop table if exists order_details;
SET FOREIGN_KEY_CHECKS = 1;

(注意，这回答了如何禁用外键检查，以便能够以任意顺序删除表。它没有回答如何为所有现有的表自动生成drop-table语句，并在一个脚本中执行它们。Jean的回答是。)

从这个答案来看，

执行:

  use `dbName`; --your db name here
  SET FOREIGN_KEY_CHECKS = 0; 
  SET @tables = NULL;
  SET GROUP_CONCAT_MAX_LEN=32768;

  SELECT GROUP_CONCAT('`', table_schema, '`.`', table_name, '`') INTO @tables
  FROM   information_schema.tables 
  WHERE  table_schema = (SELECT DATABASE());
  SELECT IFNULL(@tables, '') INTO @tables;

  SET        @tables = CONCAT('DROP TABLE IF EXISTS ', @tables);
  PREPARE    stmt FROM @tables;
  EXECUTE    stmt;
  DEALLOCATE PREPARE stmt;
  SET        FOREIGN_KEY_CHECKS = 1;

这将从当前使用的数据库中删除表。您可以使用use设置当前数据库。

或者，Dion接受的答案更简单，只是需要执行两次，第一次获取查询，第二次执行查询。我提供了一些愚蠢的反勾来转义db和表名中的特殊字符。

  SELECT CONCAT('DROP TABLE IF EXISTS `', table_schema, '`.`', table_name, '`;')
  FROM   information_schema.tables
  WHERE  table_schema = 'dbName'; --your db name here

简单明了(可能)。

也许不是一个很好的解决方案，但这对我很有效，帮了我大忙。

服务版本:5.6.38 MySQL Community Server (GPL)

我遵循的步骤:

 1. generate drop query using concat and group_concat.
 2. use database
 3. disable key constraint check
 4. copy the query generated from step 1
 5. enable key constraint check
 6. run show table

MySQL壳

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';
+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 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> 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> 

在php中，它很简单:

$pdo = new PDO('mysql:dbname=YOURDB', 'root', 'root');

$pdo->exec('SET FOREIGN_KEY_CHECKS = 0');

$query = "SELECT concat('DROP TABLE IF EXISTS ', table_name, ';')
          FROM information_schema.tables
          WHERE table_schema = 'YOURDB'";

foreach($pdo->query($query) as $row) {
    $pdo->exec($row[0]);
}

$pdo->exec('SET FOREIGN_KEY_CHECKS = 1');

只需要记住将YOURDB更改为数据库的名称，当然还有user/pass。

在像bash/zsh这样的Linux shell中:

DATABASE_TO_EMPTY="your_db_name";
{ echo "SET FOREIGN_KEY_CHECKS = 0;" ; \
  mysql "$DATABASE_TO_EMPTY" --skip-column-names -e \
  "SELECT concat('DROP TABLE IF EXISTS ', table_name, ';') \
   FROM information_schema.tables WHERE table_schema = '$DATABASE_TO_EMPTY';";\
  } | mysql "$DATABASE_TO_EMPTY"

这将生成命令，然后立即将它们输送到第二个客户端实例，该实例将删除表。

聪明的部分当然是从这里的其他答案复制的-我只是想要一个复制-粘贴的一行程序来实际完成OP想要的工作。

当然，你也必须在这些mysql命令中输入你的凭证(两次)，除非你有一个非常低的安全设置。(或者你可以用mysql命令的别名来包含你的学分。)