我发现最简单的方法是像下面这样做，只需用自己的表名替换表名。重要的是确保最后一行永远是 设置FOREIGN_KEY_CHECKS = 1;

SET FOREIGN_KEY_CHECKS=0;
TRUNCATE `table1`;
TRUNCATE `table2`;
TRUNCATE `table3`;
TRUNCATE `table4`;
TRUNCATE `table5`;
TRUNCATE `table6`;
TRUNCATE `table7`;
SET FOREIGN_KEY_CHECKS=1;

下面是一个截断本地数据库中所有表的过程。

如果它不起作用，请告诉我，我会删除这个答案。

未测试的

CREATE PROCEDURE truncate_all_tables()
BEGIN

   -- Declare local variables
   DECLARE done BOOLEAN DEFAULT 0;
   DECLARE cmd VARCHAR(2000);

   -- Declare the cursor
   DECLARE cmds CURSOR
   FOR
   SELECT CONCAT('TRUNCATE TABLE ', TABLE_NAME) FROM INFORMATION_SCHEMA.TABLES;

   -- Declare continue handler
   DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done=1;

   -- Open the cursor
   OPEN cmds;

   -- Loop through all rows
   REPEAT

      -- Get order number
      FETCH cmds INTO cmd;

      -- Execute the command
      PREPARE stmt FROM cmd;
      EXECUTE stmt;
      DROP PREPARE stmt;

   -- End of loop
   UNTIL done END REPEAT;

   -- Close the cursor
   CLOSE cmds;

END;

我发现TRUNCATE表..外键约束有问题，即使在NOCHECK约束ALL之后，所以我使用DELETE FROM语句代替。这意味着身份种子不会被重置，你总是可以添加一个DBCC CHECKIDENT来实现这一点。

我使用下面的代码打印到消息窗口的sql截断数据库中的所有表，然后运行它。这只会让犯错变得更难。

EXEC sp_MSforeachtable 'PRINT ''ALTER TABLE ? NOCHECK CONSTRAINT ALL'''
EXEC sp_MSforeachtable 'print ''DELETE FROM ?'''
EXEC sp_MSforeachtable 'print ''ALTER TABLE ? WITH CHECK CHECK CONSTRAINT all'''

To truncate a table, one must drop the foreign key constraints mapped to the columns in this table from other tables (in fact on all tables in the specific DB/Schema). So, all foreign key constraints must be dropped initially followed by table truncation. Optionally, use the optimize table (in mysql, innodb engine esp) to reclaim the used data space/size to OS after data truncation. Once data truncation is carried out, create the same foreign key constraints again on the same table. See below a script that would generate the script to carry out the above operations. SELECT CONCAT('ALTER TABLE ',TABLE_SCHEMA,'.',TABLE_NAME,' DROP FOREIGN KEY ',CONSTRAINT_NAME,';') FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE CONSTRAINT_TYPE='FOREIGN KEY' AND TABLE_SCHEMA='<TABLE SCHEMA>' UNION SELECT CONCAT('TRUNCATE TABLE ',TABLE_SCHEMA,'.',TABLE_NAME,';') FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='<TABLE SCHEMA>' AND TABLE_TYPE='BASE TABLE' UNION SELECT CONCAT('OPTIMIZE TABLE ',TABLE_SCHEMA,'.',TABLE_NAME,';') FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='<TABLE SCHEMA>' AND TABLE_TYPE='BASE TABLE' UNION SELECT CONCAT('ALTER TABLE ',TABLE_SCHEMA,'.',TABLE_NAME,' ADD CONSTRAINT ',CONSTRAINT_NAME,' FOREIGN KEY(',COLUMN_NAME,')',' REFERENCES ',REFERENCED_TABLE_NAME,'(',REFERENCED_COLUMN_NAME,');') FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE CONSTRAINT_NAME LIKE 'FK%' AND TABLE_SCHEMA='<TABLE SCHEMA>' INTO OUTFILE "C:/DB Truncate.sql" LINES TERMINATED BY '\n';

现在，运行Db Truncate。生成SQL脚本

的好处。 1)回收磁盘空间 2)不需要删除并重新创建具有相同结构的DB/Schema

缺点。 1) FK约束应该是表中的名称，约束名称中包含“FK”。

给@Mathias Bynens的回答补充一点。当我运行这个时，我得到了一个错误，因为外键检查

mysql -Nse 'SHOW TABLES' <database_name> | while read table; do mysql -e "SET FOREIGN_KEY_CHECKS=0; DROP TABLE $table" <database_name>; done

如果数据库中有视图，则返回一个错误。我必须通过drop view <view_name>手动清除视图;

我不确定，但我认为有一个命令可以使用，你可以复制数据库的模式到新的数据库，一旦你这样做了，你可以删除旧的数据库，这之后，你可以再次复制数据库模式到旧的名称。