Sql 合并两个SELECT查询并在一个表中显示数据?
以下查询正在显示来自两个表的数据,工作正常,但我希望合并结果并在单个表中显示输出:Sql 合并两个SELECT查询并在一个表中显示数据?,sql,merge,sql-server-2012,Sql,Merge,Sql Server 2012,以下查询正在显示来自两个表的数据,工作正常,但我希望合并结果并在单个表中显示输出: SELECT ITEM_MODEL, QUANTITY FROM ITEMS_MASTER WHERE ITEM_MODEL = 'keyboard' SELECT AVG(RATE) AS Avg_Rate, SUM(AMOUNT) AS TOTAL_AMOUNT FROM ITEM_DETAILS WHERE ITEM_MODEL = '
SELECT
ITEM_MODEL, QUANTITY
FROM
ITEMS_MASTER
WHERE
ITEM_MODEL = 'keyboard'
SELECT
AVG(RATE) AS Avg_Rate,
SUM(AMOUNT) AS TOTAL_AMOUNT
FROM
ITEM_DETAILS
WHERE
ITEM_MODEL = 'keyboard'
GROUP BY
ITEM_MODEL
做这件事的可能方法是什么我对SQL非常陌生,所以请指导我如何做。提前谢谢。我正在使用SQL Server 2012。试试这个
Select ITEM_MODEL,QUANTITY
from ITEMS_MASTER t join(
Select ITEM_MODEL,AVG(RATE) as Avg_Rate,SUM(AMOUNT) as TOTAL_AMOUNT from ITEM_DETAILS
where ITEM_MODEL= 'keyboard' Group by ITEM_MODEL
) s
on s.item_model = t.item_model
where ITEM_MODEL='keyboard'
我只是把你的两个查询都编译成一个。这只是其中一种方法
select
m.ITEM_MODEL,
m.QUANTITY,
d.Avg_Rate,
d.TOTAL_AMOUNT
from
(Select ITEM_MODEL, AVG(RATE) as Avg_Rate,SUM(AMOUNT) as TOTAL_AMOUNT
from ITEM_DETAILS
where ITEM_MODEL= 'keyboard' Group by ITEM_MODEL) D
inner join
ITEMS_MASTER m on m.ITEM_MODEL = d.ITEM_MODEL
它将只显示“键盘”,因为聚合内联查询已经排除了所有其他查询。我还将Item\u master
移到了第二个位置,以获得更好的性能您需要了解的信息。