【数据库-MySql】清空所有表格的所有数据

方式一、
drop procedure if exists del_all_tb;
delimiter $$
create procedure del_all_tb(db char(20))
begin
declare done int default 0;
declare tb char(100);
declare cur cursor for select table_name from infoRmation_schema.tables where table_schema = db and table_type = "BASE TABLE";
declare continue handler for not found set done = 1;
open cur;

repeat
fetch cur into tb;
set @sql := concat("truncate ", tb, ";");
prepare stmt from @sql;
execute stmt;
deallocate prepare stmt;
until done end repeat;
close cur;
end $$
delimiter ;
call del_all_tb("atdps");
drop procedure if exists del_all_tb;
方式二、
#如果存在del_all_tb存储过程则删除del_all_tb存储过程
drop procedure if exists del_all_tb;
#如果存在 tmpTable 临时表则删除 del_all_tb 临时表
DROP TABLE if EXISTS tmpTable;
#创建 del_all_tb存储过程
create procedure del_all_tb(db char(20))
begin
#申明变量
DECLARE tntmp VARCHAR(100);
#创建临时表
create table tmpTable (tablename VARCHAR(100),flag int);
#清空临时表
truncate TABLE tmpTable;
#将需要清空的表插入到临时表
INSERT INTO tmpTable(tablename , flag ) (SELECT table_name ,0 as a FROM information_schema.tables
WHERE table_schema = db and table_type='BASE TABLE');

#循环获取所有的表明以及删除状态
SELECT tablename into tntmp FROM tmpTable WHERE flag = 0 limit 1;
WHILE tntmp <> '' DO

#拼写删除语句
set @sqlText := concat("truncate ", tntmp, ";");
prepare stmt from @sqlText;
#执行语句
execute stmt;
#释放删除语句
deallocate prepare stmt;
#更新表状态
UPDATE tmpTable SET flag=1 WHERE tablename = tntmp;
#选择一下条语句
SELECT tablename into tntmp FROM tmpTable WHERE flag = 0 limit 1;
END WHILE;
end;
call del_all_tb("atdps");

#如果存在del_all_tb存储过程则删除del_all_tb存储过程
drop procedure if exists del_all_tb;
#如果存在 tmpTable 临时表则删除 del_all_tb 临时表
DROP TABLE if EXISTS tmpTable;