Oracle查询数据库中所有表的记录数

方法一：

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

获取要统计的值

方法二：

select t.table_name,t.num_rows from user_tables t 

查看记录数，但是num_rows存储的是上次分析后的值，不准确，要使用该方法，必须分析后才可以试用

完成的语句为

declare
v_tName varchar(50);
v_sqlanalyze varchar(500);
v_num number;
v_sql varchar(500);
cursor c1
is
select table_name from user_tables;
begin
open c1;
loop
fetch c1 into v_tName;
if c1%found then
v_sqlanalyze :='analyze table '||v_tName||' estimate statistics';
execute immediate v_sqlanalyze;
v_sql := 'select NUM_ROWS from user_tables where table_name =upper('''||v_tName||''')';
execute immediate v_sql into v_num;
dbms_output.put_line('表名： '||v_tName||' 行数： '||v_num);
else
exit;
end if;
end loop;
end;