Question

Access数据库,用一条SQL语句,提取两个表的内容(数据结构相同的字段部分),合并成一个表,并按时间排序.

Access数据库,用一条SQL语句,提取两个表的内容(数据结构相同的字段部分),合并成一个表,并按时间排序. 如下:
table1:id,name,time,age,colA,colB
table2:id,name,time,colC,colD

我的思路是查询出一个虚拟表,再根据已经查出的虚拟表Time字段排序,语句如下

select NewTable.name,NewTable.time from
(select top 5 name,time from table1 union all
select top 5 name,time from table2) as NewTable
order by time

这样写查不出数据,用这种方法查不行的么?请高人指点哪里出的问题,怎么实现?先谢过
select NewTable.name,NewTable.time from
(select top 5 name,time from table1 union all
select top 5 name,time from table2) as NewTable
order by time desc

desc排序关键字落写了

Answer 1

table1:id,name,time,age,colA,colB
union
table2:id,name,time,0 as age, colC as colA,colD as colB

Answer 2

SELECT newtable.name,newtable.time FROM (SELECT * FROM (SELECT NAME,TIME FROM table1) UNION ALL (SELECT NAME,TIME FROM table2)) as newtable order by newtable.TIME DESC

Answer 3

没问题啊,我刚才弄了一下都能执行的
只不过建表的时候字段用time时提示有错误，我就把time字段改了个别的名字