你好,首先我的表t1是这样的
ID cid enter sort
===================
1 20
2 1 5
3. 1. 6
4 10
5 4 2
6. 30
我需要得到这样的结果
ID enter sort stock
===============================
1 20 11 9
4 10 2 8
6. 30. 0. 30
什么意思取所有id,其中cid为空,取enter号,然后取所有cid,其中cid=id,取排序号之和,然后最后股票=enter-排序。
就像mu db一样,结果一定是这样的。
ID enter sort stock
===============================
18 1P 6 4
我的疑问
SELECT p_stock.id, p_stock.code, p_stock.quant_entr, SUM(p_stock_1.quant_sort) AS Expr1
FROM (p_stock INNER JOIN
p_stock p_stock_1 ON p_stock.id = p_stock_1.cid)
HAVING (p_stock.id = 18) AND (p_stock.code = 27)
谢谢你的帮助
我想你可以用 join
:
select t1.id, t1.enter, t2.sort, (t1.enter - t2.sort) as stock
from t as t1 join
t as t2
on t2.id = t1.id + 1
where t1.id in (1, 3) -- or perhaps all odd numbers