Oracle查询数据库中所有表的记录数

本文转自 http://space.itpub.net/17179887/viewspace-628297
首先建立一个计算函数

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;

然后通过计算函数进行统计

select table_name, count_rows(table_name) nrows from user_tables

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