常用sql语句收藏

查询当前用户下：所有表的行数

适用于：oracle

select t.table_name,t.num_rows from user_tables t ORDER BY num_rows DESC ,table_name

如果以上sql查询不到，执行以下脚本后重新运行上面的句子即可【我是直接就可运行的】

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;

参考：https://www.cnblogs.com/luxd/p/6141476.html