Question

我有一个来自此查询的表格列表

select table_name  from all_tab_columns  where column_name='EXCN_ID'

我想使用此查询获取所有必需的列

select B.* 
from t_int_excn_log A, TABLE B
where A.excn_strt_tm < sysdate-7  and A.excn_id=B.excn_id;

需要您帮助循环表列表，这样，它将代替TABLE，按照上一个查询逐个调用所有表。

Answer 1

你可以在这种情况下使用游标。

declare @name varchar(200)
declare cur cursor for 
select   table_name  from all_tab_columns  where column_name='EXCN_ID'
open cur
fetch next from @name
while @@fetch_status = 0
begin
    select B.* 
    from t_int_excn_log A, @name B
    where A.excn_strt_tm < sysdate-7  and A.excn_id=B.excn_id;
fetch next from @name
end
close cur
deallocate cur

Answer 2

试试这个..

DECLARE CURSOR cur IS 
       select   table_name  from all_tab_columns  where column_name='EXCN_ID'
       FROM occupancy WHERE occupied_dt = SYSDATE;
    cur_rec table_name%ROWTYPE;
 BEGIN
    OPEN cur;
    LOOP
       FETCH cur INTO cur_rec;
       EXIT WHEN Cur%NOTFOUND;
       select B.* 
        from t_int_excn_log A, cur_rec B
        where A.excn_strt_tm < sysdate-7  and A.excn_id=B.excn_id;
    END LOOP;
    CLOSE cur;
 END;

使用表列表创建循环并逐个调用所有表

2 个答案: