oracle如何批量查询数据表记录数

发布网友发布时间：2022-04-08 07:00

共3个回答

懂视网时间：2022-04-08 11:21

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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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Oracle查询数据库中所有表的记录数

标签：oracle 数据库表记录数统计

热心网友时间：2022-04-08 08:29

首先，oracle中有存放表名的系统表，所以你那个tcmz有点多余

declare
v_tablename varchar2(60);
v_count int;
v_sql varchar2(2000);
cursor cur_tablename is
select table_name from user_tables;
begin
open cur_tablename;
loop
fetch cur_tablename into v_tablename;
exit when cur_tablename%notfound;
v_sql:='select count(*) from '||v_tablename||'';
execute immediate v_sql into v_count;
dbms_output.put_line(v_tablename||':'||v_count);
end loop;
close cur_tablename;
end;

如果非要用你那个的话，可以这样改

declare
v_tablename varchar2(60);
v_count int;
v_sql varchar2(2000);
cursor cur_tablename is
select 表名 from tcmz;--字段名你替换成你自己的
begin
open cur_tablename;
loop
fetch cur_tablename into v_tablename;
exit when cur_tablename%notfound;
v_sql:='select count(*) from '||v_tablename||'';
execute immediate v_sql into v_count;
dbms_output.put_line(v_tablename||':'||v_count);
end loop;
close cur_tablename;
end;

热心网友时间：2022-04-08 09:47

DECLARE v_sql varchar2(300);
begin
FOR COL IN (select distinct tcmz from a) loop
v_sql := null;
v_sql := 'update a set 记录数 = (select count(1) from '||COL.tcmz||') where tcmz
= '''||COL.tcmz||'''';
execute immediate v_sql;
commit;
end loop;

end;