查询用户下有数据的表

方法一：

select num_rows,table_name from user_tables where num_rows>0;

方法二：

若以上SQL查找不到，执行如下脚本即可：
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1、
create or replace function count_rows(table_name in varchar2,
                              owner in varchar2 default null)
return number
authid current_user
IS
   num_rows number;
   stmt varchar2(2000);
begin
   if owner is null then
      stmt := 'select count(*) from "'||table_name||'"';
   else
      stmt := 'select count(*) from "'||owner||'"."'||table_name||'"';
   end if;
   execute immediate stmt into num_rows;
   return num_rows;
end;

2、再查select table_name, count_rows(table_name) nrows from user_tables