select t.table_name,t.num_rows from user_tables t

若以上SQL查找不到（反正我的是查不到），执行如下脚本即可：
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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;
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

之后，再查select table_name, count_rows(table_name) nrows from user_tables,就可以了

?

?

?2、查询所有用户的 数据库表记录

select t.owner, count(*) from all_tables t group by t.owner