select concat('drop table ',table_name,';') from TABLES where table_schema='数据库名称';
select concat('truncate ',table_name,';') from TABLES where table_schema='数据库名称';
select concat('drop table ',table_name,';') from TABLES where table_schema='数据库名称';
select concat('truncate ',table_name,';') from TABLES where table_schema='数据库名称';