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