常用的sql脚本范例

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oracle查询所有表的记录数：
 

create or replace function "DBNAME".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;
 
SELECT TABLE_NAME,count_rows(TABLE_NAME,'DBNAME') FROM ALL_TABLES WHERE OWNER='SNMS'