本文介绍了SQLite:SELECT语句中的累加器(求和)列的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一张这样的表:
从表中选择值;
SELECT value FROM table;
value 1 3 13 1 5
我想添加一个累加器列,以便得到以下结果:
I would like to add an accumulator column, so that I have this result:
value accumulated 1 1 3 4 13 17 1 18 5 23我该怎么做?我想做什么的真实名字是什么?谢谢
How can I do this? What's the real name of what I want to do? Thanks
推荐答案尝试这种方式:
select value, (select sum(t2.value) from table t2 where t2.id <= t1.id ) as accumulated from table t1,但如果它在您的数据库上不起作用,则只需添加订单即可。
but if it will not work on your database, just add order by something
select value, (select sum(t2.value) from table t2 where t2.id <= t1.id order by id ) as accumulated from table t1 order by id的订单
这在oracle上有效;)但应该在sqlite上
this works on an oracle ;) but it should on a sqlite too
更多推荐
SQLite:SELECT语句中的累加器(求和)列
发布评论