b*****e
发帖数: 474 | 1 if different names have different ids, would this work:
select StockName, max(price)
from StockData
group by StockID, StockName
select D1.*
from StockData as D1, (select StockID, max(price)
from StockData group by StockID) as D2
where D1.StockID = D2.StockID
AND D1.price < ...
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f*****g
发帖数: 15860 | 2 SELECT * FROM STOCKDATA S,
(select stockid, max(price)
from StockData
group by StockID) AS M
WHERE S.stockid = M.stockid
有 |
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A*******y
发帖数: 11148 | 7 写了段SQL语法，数据库是很多股票月度performance
如果希望挑出每只股票价格最高的纪录的话，比如
select max(price)
from StockData
group by StockID
这样一来，如果我想加入其他字段，比如StockName，系统就会说即不在Group by又没有
aggregate。。。请问有什么解决办法吗？
还有，如果我想按照价格挑选所有字段，有什么办法不用手工输入所有字断名吗？
谢谢大家 |
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a*******t
发帖数: 891 | 8 fryking's method should work, probably the correct way also.
but usually I just cheat and use
select max(stockName) as StockName, max(price) as MaxPrice
from StockData
where price is between 10 and 20 --your 2nd question
group by StockID
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