清空数据库所有表的数据
时间：2022-03-14 03:03
declare cursor c_t is select table_name from user_tables;
table_name user_tables.table_name%type;
begin open c_t;
loop fetch c_t into table_name;
exit when c_t%notfound;
execute immediate ‘delete from ‘ || table_name;
end loop;
close c_t;
end;
