SQL - 选择最小的排

我怎样才能获得这些线（同线最小运行，它并不总是2）：SQL - 选择最小的排

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从这个？

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这是我的选择：

select SCR.order_number, SCR.product_code, REL.operation, REL.quantity 
from scrDATA as SCR INNER JOIN 
    relBDE as REL ON SCR.order_number = REL.order_number

我需要算一件为ORDER_NUMBER和产品代码（例如，1500个为order_numberFA36001607和5个为order_numberFP7201127）

来源

2012-03-19 gaffcz

您正在使用哪个数据库管理系统？ – 2012-03-19 14:50:18

Yuck：啊哈，每个表relBDE和scrDATA都有他们的主要ID – gaffcz 2012-03-19 14:54:58

@Yuck - 我不认为你提到的行是相同的。它们之间的product_code是不同的。 – 2012-03-19 14:55:18

喜欢的东西：

select SCR.order_number, SCR.product_code, REL.operation, SUM(REL.quantity) 
FROM scrDATA as SCR 
INNER JOIN relBDE as REL ON SCR.order_number = REL.order_number, 
(SELECT SCR2.order_number, MIN(REL2.operation) AS operation 
       FROM scrDATA as SCR2 
       INNER JOIN relBDE as REL2 ON SCR2.order_number = REL2.order_number 
       GROUP BY SCR2.order_number) AS SCR_OP 
WHERE SCR.order_number = SCR_OP.order_number 
    AND SCR.operation = SCR_OP.operation 
GROUP BY SCR.order_number, SCR.product_code, REL.operation

来源

2012-03-19 14:59:08

这就是我需要的，谢谢你:-) – gaffcz 2012-03-19 15:18:30

不客气。 – 2012-03-19 15:19:40

似乎像这样会工作：

select SCR.order_number, SCR.product_code, MIN(REL.operation), REL.quantity 
from scrDATA as SCR INNER JOIN 
    relBDE as REL ON SCR.order_number = REL.order_number 
GROUP BY SCR.order_number, SCR.product_code, REL.quantity

来源

2012-03-19 14:53:18

我认为这是你需要查询：

select SCR.order_number, SCR.product_code, REL.operation, REL.quantity 
from scrDATA as SCR 
INNER JOIN relBDE as REL ON SCR.order_number = REL.order_number 
where REL.operation = 
    (select MIN(REL.operation) 
    from scrDATA as SCR 
    INNER JOIN relBDE as REL ON SCR.order_number = REL.order_number)

来源

2012-03-19 14:55:24 alf

SQL - 选择最小的排

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